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OpenAI · REASONING EFFORT GUIDE

GPT-5.4
How much thinking?

Compare None vs Low vs Medium vs High vs Extra high where tested. Find the effort setting that fits your task, and see how much extra reasoning changes the result.

SAME MODEL. DIFFERENT THINKING.

Choose a thinking level for GPT-5.4

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LiveBench

AI Agent Store task-weighted category mix. An editorial selection aid, not a measured agent success rate; weights match our published Agent Fit methodology.

Explicit effort rows · Question set: 2026-01-08 · Reviewed 2026-10-15Check the source ↗
SUGGESTED SETTING TO TESTExtra high

Lowest tested effort within 1.0 points of the best tested general agent fit.

77.6 / 100
Exact best1.0 pts10 pts

Set 0 for the highest score. Increase the gap to explore cheaper or lighter options.

THE EFFORT CURVE

Does more thinking help?

● Near-best pickOrange = score decreased

025507510070.6High77.6Xhigh
025507510070.6High77.6Xhigh

Scores out of 100 · Full 0–100 scale · tap a point to select mode B. Cyan band: within 1.0 points of the best tested score.

COST DATA NOT AVAILABLE

This study has no comparable cost data.

The recommendation uses the lowest tested effort within your allowed score gap. That does not prove it is the cheapest or fastest.

Use the token calculator below with your own usage measurements. Effort labels alone do not tell us a token bill.

Estimate your own token costs ↓
Score difference · B minus A+7.0 pts

Large gap · B scored higher

Highest minus lowest score in this study7.0 pts

Best minus lowest tested score

Highest observed score77.6

Extra high

We describe gaps under 1 point as small, 1–under 5 as noticeable, and 5 or more as large. These are reading aids, not proof that a difference would hold up in repeated tests. Equal scores can still hide different mistakes.

EVERY TESTED MODE

Results for each tested setting

2 modes · untested settings are left blank

High

Tested setting
70.6 / 100

0.0 pts vs High

Extra high

Suggested setting
77.6 / 100

+7.0 pts vs High

Full benchmark table & exact configuration IDs

Swipe inside the table for all measures. Figures from different study selections are not directly comparable.

GPT-5.4 · LiveBench · Explicit effort rows
EffortOverall benchmarkGeneral agent fitCoding agent fitResearch agent fitWriting & support fitReasoningCodingAgentic CodingMathematicsData AnalysisLanguageInstruction followingCost / taskMedian secondsOutput tokensExact source ID
High75.170.663.878.575.385.778.246.790.077.083.065.0———gpt-5.4-high
Extra high80.377.675.081.177.988.177.570.094.179.382.670.2———gpt-5.4-xhigh
SCALE THE OBSERVED COST

Effort cost difference calculator

What would A versus B cost if you repeated this benchmark’s average workload?

A · High—
B · Extra high—
Difference—This study did not report comparable costs

This source has no comparable dollar-cost observation. Use the token calculator below with your own usage; token counts alone cannot supply a full bill.

YOUR WORKLOAD

Reasoning-token cost calculator

Estimate the extra bill from thinking tokens. The starting token counts are editable examples, not measurements of GPT-5.4. Rates start from the current model snapshot.

A · High$55estimated monthly cost
B · Extra high$115estimated monthly cost

Mode B costs $60 more per month with these assumptions.

This estimate uses the token counts and prices you enter. Excludes retries, tools, caching, long-context premiums, hosting and taxes. Includes thinking in output billing; do not also include it in “visible output.” Check endpoint limits separately. Changing mode does not automatically predict tokens or quality.

READ ACROSS THE EVIDENCE

GPT-5.4 effort benchmarks at a glance

Each card compares settings tested together in one study. Scores from different benchmarks or question sets measure different work and are not averaged together.

QUESTION SET · 2026-01-08

General tasks · LiveBench 2026-01-08 · Explicit effort rows

AI Agent Store task-weighted category mix. An editorial selection aid, not a measured agent success rate; weights match our published Agent Fit methodology.

High
70.6
Extra high · pick
77.6

Near-best pick: Extra high within 1 point of the best score. Highest-to-lowest score gap: 7.0 points.

Explore this study ↗

Original source ↗

All results and the exact settings tested

A dash means the study did not report that result. This table compares only the versions and settings tested on the same questions in this study.

GPT-5.4 · General tasks · LiveBench 2026-01-08 · Explicit effort rows · Explicit effort rows
Effort / budgetOverall benchmarkGeneral agent fitCoding agent fitResearch agent fitWriting & support fitReasoningCodingAgentic CodingMathematicsData AnalysisLanguageInstruction followingExact source configuration
High75.170.663.878.575.385.778.246.790.077.083.065.0gpt-5.4-high
Extra high80.377.675.081.177.988.177.570.094.179.382.670.2gpt-5.4-xhigh

Download this study’s data (CSV) ↓

PUBLISHED BENCHMARK

Math, code & science · OckBench

Correct answers out of 200 problems. Domain proportions are 100 math, 60 coding and 40 science.

None
23.5
Low
78.0
Medium · pick
82.0
High
80.5

Near-best pick: Medium within 1 point of the best score. Highest-to-lowest score gap: 58.5 points.

Explore this study ↗

Original source ↗

All results and the exact settings tested

A dash means the study did not report that result. This table compares only the versions and settings tested on the same questions in this study.

GPT-5.4 · Math, code & science · OckBench · 200 selected problems
Effort / budgetOverall accuracyMathematicsCoding testsScienceAverage output tokensExact source configuration
None23.517.020.045.0689gpt-5.4
Low78.073.091.770.03,056gpt-5.4-low
Medium82.078.093.375.03,177gpt-5.4-medium
High80.574.098.370.03,267gpt-5.4-high

Download this study’s data (CSV) ↓

Reasoning effort, explained

Which GPT-5.4 thinking level is most efficient?

Extra high is the lowest-effort option within 1 point of the best general agent fit in LiveBench. The tested score range is 7.0 points. This allows a score up to 1 point below the best result in the first listed study. Change the study, task and allowed score gap above to explore another comparison. It is a shortlist for testing your own workload.

Which GPT-5.4 effort settings are compared?

None, Low, Medium, High, Extra high appear in the collected studies. Each chart only includes modes tested together in that study. These published labels do not establish that every endpoint or application exposes every setting.

Does more effort improve GPT-5.4?

In the first listed LiveBench sweep, the tested score range is 7.0 points and no adjacent effort increase lowers the score. This does not guarantee a gain on every task or with a different testing setup.

How much more does high effort cost for GPT-5.4?

Use the A/B selector and measured-cost calculator when the source reports dollar costs. For your own agent, enter average input, visible output and thinking tokens in the token calculator. Higher effort is adaptive, so the label itself cannot tell you the bill. Missing costs stay missing.

Keep comparing

AI Agent Store · Model comparisons · Data reviewed 2026-10-15Sources, limitations & corrections ↗