Writing OKRs

Claude Sonnet 5 vs Gemini 3.1 Pro
for writing OKRs

This page compares two models on one job: turning a fuzzy quarterly priority into OKRs with measurable key results. It covers pushback on vague metrics, cost and prompting, and ends with a fair way to test both on your own priorities.

Aug 12, 2026 · 11 min read

The bottom line
Sonnet 5 leads and Gemini challenges

Claude Sonnet 5 is the safer single-model choice for converting a rough quarterly priority into usable OKRs. Gemini 3.1 Pro's possible edge is narrower: a plausible challenger during the diagnostic stage, especially with audio or video source material, not a proven better final writer.

That split rests on a realistic business-deliverable benchmark2, a broader capability index3 and the published token prices46, not on a dedicated OKR-writing benchmark, since none exists publicly for these exact models. The evidence is not strong enough to say that Gemini will routinely reject vague executive wording while Sonnet will accept it.

The practical verdict is a two-stage workflow: give Gemini 3.1 Pro a cautious, low-confidence edge as the skeptical first-pass reviewer, then use Claude Sonnet 5 to synthesize the final OKRs. If only one model can be adopted, use Sonnet 5 for the whole job and add an explicit audit step to the prompt.

Who this is for
Which planning roles this fits

Start with Sonnet 501

Strategy and ops leads

You turn a broad direction into a reviewable set of objectives and key results every quarter. Sonnet 5's lead on business-deliverable benchmarks suits this the closest.

Start with Sonnet 502

Product and marketing teams

You receive priorities like 'grow enterprise adoption' and need them turned into measurable commitments fast. Sonnet 5's structured output holds a consistent schema across many teams.

Try Gemini for capture03

Teams working from recordings

Your rough priority exists as a meeting recording rather than written notes. Gemini 3.1 Pro's direct audio and video input can start the process from that source.

Use Gemini to challenge04

Leaders guarding vague goals

A politically sensitive priority needs a skeptical read before it becomes a commitment. Run Gemini as the challenger first, then Sonnet 5 for the final, defensible draft.

What we compared
OKR quality not the app

This page compares the two models through their API in one neutral setup, not one model inside one OKR-tracking tool against the other inside a different dashboard.

The parts that matter for OKRs are identifying what the priority actually means, exposing missing baselines and owners, separating outcomes from activities, and proposing measurable key results without fabricating business data. Official docs come first, then the closest independent benchmark evidence.

We left tools out of the spec table on purpose. An OKR-tracking platform's dashboard, integrations or approval workflow depend on the app around the model, so the same model can behave very differently in a chat product, in the API or inside a workspace. Judging those here would compare software, not OKR writing.

Specs at a glance
The OKR-relevant numbers

The model facts that actually affect turning a priority into OKRs. Tool features are left out, since they change with the app around the model.

Spec
Claude Sonnet 5
Gemini 3.1 Pro
Why it matters
Context window
1,000,000 tokens
1,048,576 tokens
Room for strategy notes, prior OKRs and dashboards in one request45
Max output
128,000 tokens
65,536 tokens
Sonnet 5 can return a longer set of objectives, key results and assumptions in one pass45
List price
$2 in / $10 out per million
$2 in / $12 out per million, up to 200,000 input tokens
Sonnet 5 is cheaper on output at its standard rate76
Long-context price
Standard rate across the full window
$4 in / $18 out per million above 200,000 input tokens
Sonnet holds one rate across its window, while Gemini's rate rises for larger source packets76
Inputs
Text and image
Text, image, audio and video
Gemini can read a recorded strategy meeting directly, while Sonnet's documented inputs are text and image45
Structured output
Schema-constrained JSON
Structured output and function calling
Both can return an objective, key results, assumptions and owners in a fixed schema85
Deployment status
Current API model
Preview, no shutdown date announced
Sonnet 5 ships on a stable production endpoint, while Gemini's exact version is still preview45

Figures from Anthropic and Google documentation, checked August 13, 2026. Anthropic's pricing page confirms Sonnet 5's $2/$10 rate is the standard price, and a previously scheduled September 1, 2026 increase to $3/$15 will not occur.

Head to head
Where each model wins on OKRs

The answer changes by part of the job, not by brand. This is the main analysis: which model has the edge on each part of turning a priority into OKRs, and what backs it up.

Job
Better choice
Why the edge exists
Best evidence
Detecting vague or unsupported metrics
No reliable winner, though Gemini gets a low-confidence edge
No OKR-specific test exists. A narrator-bias benchmark reported a stronger earlier result for Gemini than the current Sonnet 5 result, but the runs are not in one matched cohort, so this is a weak proxy only.
An earlier Gemini 3.1 Pro result outperformed the current Sonnet 5 result on a narrator-bias sycophancy benchmark1
Producing the final business deliverable
Claude Sonnet 5
A realistic knowledge-work benchmark testing requirement discovery, evidence use and conflict resolution gives Sonnet 5 a very large lead. It is not an OKR benchmark, but it directly tests the surrounding skills.
Sonnet 5 scored 1,383 Elo against Gemini's 458 on AA-Briefcase2
General reasoning from an underspecified priority
Sonnet 5, directional
Sonnet 5 scored higher on a broad composite index at maximum effort, though the two models were not configured identically, so the result is directional rather than a controlled comparison.
Sonnet 5 scored 55 against Gemini's 48 on Artificial Analysis's Intelligence Index3
Holding a strict OKR schema
Tie
Both APIs support schema-constrained structured output, which establishes capability but not which model produces more semantically valid OKRs inside that schema.
Both vendors document structured output support for these exact models85
Long-source synthesis
Tie on capacity, Sonnet on cost
Both expose roughly one-million-token input context. Anthropic applies its standard rate across the window, while Google doubles pricing once a prompt exceeds 200,000 tokens.
Anthropic prices the full window at one rate, while Gemini's rate rises above 200K input tokens76
Short-input API cost today
Claude Sonnet 5
Both charge the same input rate below Gemini's threshold, but Sonnet's output rate is lower, and Anthropic confirms this is the standard rate, not a temporary one that is due to rise.
Sonnet lists $10 output against Gemini's $12 per million tokens, checked August 13, 202676
Deployment stability
Claude Sonnet 5
Google still labels the exact Gemini endpoint Preview. Sonnet 5 is a published current API model, which matters for a workflow the team plans to run every quarter.
Gemini 3.1 Pro's model page identifies it as Preview with no shutdown date5
Mixed-media priority discovery
Gemini 3.1 Pro
Gemini accepts audio and video directly as model inputs, which matters only when the source is a recording rather than written notes.
Gemini 3.1 Pro's documented inputs include audio and video alongside text and images5

Better-choice calls map to dimensions the sources actually evaluated. Where the evidence is a broad benchmark or a weak proxy rather than an OKR-specific test, the row says so.

How to test
A fair test on your own priorities

A useful test feels boring. Same source material, same schema, no editing before scoring. Then judge what your team actually pays for: did it identify undefined terms, avoid inventing internal figures, and attach a target, deadline and owner to each key result.

Sample01

Pick three to five priorities

Include at least one deliberately unmeasurable priority, such as 'improve customer engagement,' alongside a well-defined priority with real baselines and one that disguises an activity as an outcome.

Prompt02

Give both the same instruction

The same source material, thinking or effort level and output schema for both. Neither model gets a richer version. If you change the prompt mid-test, apply the change to both.

Setup03

Use the same setup

No tools unless both receive equivalent tools, and run both in the environment where the team will deploy the workflow. Chat-product behavior can differ from the API.

Scoring04

Score without editing first

Do not edit outputs before scoring. Check whether it asked for the missing baseline rather than inventing one and whether it distinguished an objective from an initiative. For commercial use, conceal model names and use at least two human reviewers.

What the evidence shows
Delivers well and rarely pushes back

Public evidence supports Claude Sonnet 5 for business synthesis, but it does not settle whether either model reliably pushes back on a vague priority. Here is what each source helps judge.

Source
What it measures
What it suggests
How to weigh it
AA-Briefcase
Multi-week product-management and corporate-strategy scenarios with planted conflicts
Sonnet 5's large lead suggests a meaningful advantage turning messy context into a complete deliverable
Uses an agentic harness and file-producing tasks, so its score is not a direct OKR-writing accuracy rate2
Artificial Analysis Intelligence Index
Composite of knowledge, reasoning, long-context and professional-work evaluations
Sonnet 5 leads at maximum effort
Configuration differences between the two models prevent a perfectly controlled conclusion3
Narrator-bias sycophancy benchmark
Whether a model agrees with whichever party is speaking
An earlier Gemini result outperformed the current Sonnet 5 result
The runs are not in one current matched cohort, and social consistency is not the same as identifying a missing KPI baseline1

The sycophancy evidence is mixed. Anthropic's own system card says Sonnet 5 is its strongest tested model on a related dishonesty measure, which sits alongside the less favorable narrator-bias result above. Treat both as motivation for a pushback test, not a decided verdict.

How to prompt each one
An audit phase before drafting

Both models perform this task better when critique and drafting are separated. Do not ask either one to simply 'turn this into OKRs', since that invites it to fill gaps with plausible numbers.

Claude Sonnet 5 does best with explicit phases, rejection criteria and a structured final schema, converting its business-synthesis strength into a gated workflow rather than letting polished prose hide weak measurement9.

Gemini 3.1 Pro does best with an explicit adversarial role followed by a separate construction phase, with thinking enabled and a schema that distinguishes facts from assumptions5.

A Claude Sonnet 5 prompt: audit before drafting

Audit this priority before drafting. List every undefined
outcome, missing baseline, arbitrary target, activity
disguised as a key result, and unavailable data source.

Do not invent internal figures. Ask up to five questions.

Then produce one objective and three key results, using
a clear placeholder for unresolved values and explaining
what evidence is needed to replace each placeholder.

A Gemini 3.1 Pro prompt: a skeptical reviewer role first

Act first as a skeptical operating-review chair. Try to
reject the priority on measurability grounds.

For every proposed metric, require a definition, baseline,
target, deadline, owner and system of record.

Mark all unsupported numbers as hypotheses.

Only after the audit, draft the smallest defensible
OKR set.

Weak spots
And how to fix them

The main failure for both models is confident completion of an underdefined brief. The useful question is where each one adds cleanup work, and what to change in the prompt.

Model
Weak spot
What it looks like
How to fix it
Claude Sonnet 5
Polish can hide an underdefined brief
An insufficiently specified OKR set that reads as finished because the prose is strong.
Require an audit before drafting and state that accepting undefined terms is an error. Use high, not maximum, effort unless testing shows a real gain.
Gemini 3.1 Pro
Weaker completion of complex deliverables
A thinner final document under an agentic benchmark harness, and an exact API version still labeled preview.
Use it primarily for critique, or supply a strict output schema, example key results and a final completeness checklist. Pin and monitor the preview endpoint.
Both
Round numbers can substitute for missing evidence
An attractive-looking target that was never actually supplied by the business.
Prohibit invented targets. Require every value to be labeled provided, calculated from supplied data, or proposed assumption requiring approval.

Which one to choose
Start from your OKR risk

One question first. Is the deliverable primarily a final OKR document, or a challenge to the premise behind it? Then follow the branch that matches most of your quarter.

Final document or a challenge to the premise? One model, audit and deliver Politically protected priority Source exceeds 200K tokens Source is audio or video Need a stable production endpoint Claude Sonnet 5 Gemini critique, then Sonnet synthesis Claude Sonnet 5 Gemini 3.1 Pro Claude Sonnet 5

A starting point, not a rule. Test on your own priorities before you commit.

Recommendations
Pick by your OKR profile

If you need one model to audit and deliver the final OKRs, pick Claude Sonnet 5. Its lead on realistic business-deliverable evaluation supports using it end to end2.

If the executive priority is politically protected and the model must challenge its wording, use Gemini 3.1 Pro for an initial challenger pass, but treat the advantage as low confidence, then use Claude Sonnet 5 for final synthesis12. If the source material exceeds 200,000 tokens, favor Sonnet 5 on cost, and if the source is a recording rather than written notes, favor Gemini 3.1 Pro for direct ingestion75.

If your team requires a stable production endpoint for a workflow it will run every quarter, pick Claude Sonnet 5, since Gemini's exact model remains labeled preview5. Whichever model drafts, forbid invented baselines and targets and label every assumption for review.

One case neither model nor Playgram solves: wiring OKR drafting straight into an OKR-tracking platform so key results sync automatically without a human in the loop. That needs a developer API and custom integration work, not a chat workspace, so a team building that kind of automated pipeline should evaluate the models directly through Anthropic's or Google's API rather than through Playgram.

Bottom line
Sonnet 5 wins this comparison

Claude Sonnet 5 is the better default for turning a fuzzy quarterly priority into complete, reviewable OKRs in this exact comparison. Gemini 3.1 Pro is most defensible as a challenger in a two-pass process, not as the clearly superior final writer.

The important caveat is that the specific angle, whether a model rejects vague metrics or accepts them, is not directly measured by public OKR benchmarks. Business-work benchmarks strongly favor Sonnet 5, but they use broader agentic tasks and different reasoning configurations. Gemini is also still labeled preview, and prices can change quickly.

The safest final step is to test the shape of your own priorities, not a generic prompt from the internet. A fair test needs the same setup for both models: the same source material, the same schema and the same place to run them, so the result reflects the models and not the tool around them. In practice that is harder than it sounds, since most teams end up running one model in one app and the other in a different one, on two separate subscriptions, which tilts the comparison before the first draft comes back. The cleaner the setup, the more the difference you see is really Claude Sonnet 5 vs Gemini 3.1 Pro, and not just which one happened to be easier to reach that day.

Test both in one workspace
Right here inside Playgram

That's the practical case for the steady setup just described, and it also makes every quarterly planning cycle easier. When both models sit in one workspace, a strategy lead can send the same priority to each, compare the OKR sets side by side, and hand a draft from one model to the other without setting it up again.

Take one real quarterly priority, the kind of fuzzy executive line that could hide a missing baseline, and run that exact comparison in Playgram: paste the priority once, put it in front of the latest Claude and Gemini models, and keep refining with whichever one asks the harder questions, without re-pasting the context or starting a new session for the second opinion.

The same memory carries across the team too, not just this one comparison, over the latest GPT, Claude, Gemini and Grok models and many more, all in one place10. The line-up is curated, so retired models are turned off and new ones are added as they ship.

Team memory

Shared across everyone and every model.

Project memory

Scoped to a campaign or document set.

Personal memory

Your own working style, kept private.

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Frequently asked
questions

Claude Sonnet 5 is the safer single-model choice for the completed OKR document. On AA-Briefcase, a benchmark of realistic product-management and strategy work, Sonnet 5 at maximum effort scored 1,383 Elo against Gemini 3.1 Pro's 458. That benchmark is broader and more agentic than writing OKRs, but it is the closest public evidence for turning messy business context into a rigorous deliverable. Gemini's exact model also remains labeled preview, while Sonnet 5 ships as a current API model.

There is no OKR-specific benchmark that tests this directly for either model. Anthropic reports that Sonnet 5 reduced sycophancy, meaning uncritical agreement with the user, relative to its predecessor. A separate narrator-bias benchmark reported a less favorable Sonnet 5 result against an earlier Gemini 3.1 Pro result, but the two runs are not in one current matched cohort, so treat this as a weak proxy only. The safer approach with either model is to require an explicit audit step before drafting, rather than trust either one to challenge vague wording on its own.

Claude Sonnet 5, for a typical short prompt. As of August 2026, both charge $2 per million input tokens below Gemini's 200,000-token threshold, but Sonnet 5's output rate is $10 against Gemini 3.1 Pro's $12, and Anthropic has confirmed this $2/$10 rate is now the standard price rather than a temporary one. Above 200,000 input tokens, Gemini's rate rises to $4 input and $18 output, while Sonnet holds its rate across the full context window.

Yes, and this is one of its real advantages here. Gemini 3.1 Pro accepts audio and video as direct model inputs, alongside text and images, while Claude Sonnet 5's documented inputs are text and images. That matters when the rough priority exists only as a recording rather than written notes.

Its exact API version remains labeled Preview, with no shutdown date announced as of August 12, 2026. Claude Sonnet 5 is a published, current API model. If your team's policy avoids building production workflows on preview endpoints, that alone favors Sonnet 5, separate from the writing-quality evidence.

No. Run the same prompt on both and compare the answers, or switch between them mid-conversation. You choose after reading both answers instead of guessing up front.

Related comparisons

GPT-5.5 vs Gemini 3.1 Pro for data analysisClaude Opus 4.8 vs Gemini 3.1 Pro for research reportsClaude Sonnet 5 vs Gemini 3.1 Pro for customer supportClaude Fable 5 vs Gemini 3.1 Pro for performance reviews

One priority for
both models

Send the same rough priority to the latest Claude and Gemini models, keep the schema and assumptions in one place, and see which OKR set needs fewer placeholders replaced by guesses. Set it up in a minute.

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