AI Agent StoreExtra high
Suggested setting0.0 pts vs Extra high
Anthropic · REASONING EFFORT GUIDEClaude Sonnet 5.5
Claude Sonnet 5.5
How much thinking?
Compare Extra high vs Max 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 Claude Sonnet 5.5
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.
Thinking · Question set: 2026-06-25 · 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.
72.2 / 100Exact 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
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.
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-1.2 pts
Noticeable gap · B scored lower
Highest minus lowest score in this study1.2 pts
Best minus lowest tested score
Highest observed score72.2
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.
When more thinking scored lower
Extra high → Max-1.2 pts72.2 → 71.0 on general agent fit
EVERY TESTED MODE
2 modes · untested settings are left blankResults for each tested setting
72.2 / 100
Max
A better tradeoff is available-1.2 pts vs Extra high
Full benchmark table & exact configuration IDs
Swipe inside the table for all measures. Figures from different study selections are not directly comparable.
| Effort | Overall benchmark | General agent fit | Coding agent fit | Research agent fit | Writing & support fit | Reasoning | Coding | Agentic Coding | Mathematics | Data Analysis | Language | Instruction following | Cost / task | Median seconds | Output tokens | Exact source ID |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Extra high | 77.8 | 72.2 | 64.4 | 80.6 | 78.1 | 86.8 | 88.9 | 39.3 | 96.7 | 78.6 | 83.4 | 70.5 | — | — | — | claude-sonnet-5-5-xhigh-effort |
| Max | 75.7 | 71.0 | 72.2 | 73.0 | 70.5 | 91.6 | 91.4 | 56.3 | 96.1 | 59.5 | 78.0 | 56.8 | — | — | — | claude-sonnet-5-5-max-effort |
SCALE THE OBSERVED COST
Effort cost difference calculator
What would A versus B cost if you repeated this benchmark’s average workload?
A · Extra high—
B · Max—
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 Claude Sonnet 5.5. Rates start from the current model snapshot.
A · Extra high$40estimated monthly cost
B · Max$80estimated monthly cost
Mode B costs $40 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.
Claude Sonnet 5.5 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.
General tasks · LiveBench 2026-06-25 · Thinking
AI Agent Store task-weighted category mix. An editorial selection aid, not a measured agent success rate; weights match our published Agent Fit methodology.
- Extra high · pick
- 72.2
- Max
- 71.0
Near-best pick: Extra high within 1 point of the best score. Highest-to-lowest score gap: 1.2 points.
Explore this study ↗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.
| Effort / budget | Overall benchmark | General agent fit | Coding agent fit | Research agent fit | Writing & support fit | Reasoning | Coding | Agentic Coding | Mathematics | Data Analysis | Language | Instruction following | Exact source configuration |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Extra high | 77.8 | 72.2 | 64.4 | 80.6 | 78.1 | 86.8 | 88.9 | 39.3 | 96.7 | 78.6 | 83.4 | 70.5 | claude-sonnet-5-5-xhigh-effort |
| Max | 75.7 | 71.0 | 72.2 | 73.0 | 70.5 | 91.6 | 91.4 | 56.3 | 96.1 | 59.5 | 78.0 | 56.8 | claude-sonnet-5-5-max-effort |
Reasoning effort, explained
Which Claude Sonnet 5.5 thinking level is most efficient?
Extra high is the lowest-effort option within 1 point of the best general agent fit in LiveBench. Max trails the best tested score by 1.2 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 Claude Sonnet 5.5 effort settings are compared?
Extra high, Max 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 Claude Sonnet 5.5?
In LiveBench, Extra high to Max lowers the observed score by 1.2 points. The overall tested range is 1.2 points. These are observed differences, not proof that extra thinking caused the decline.
How much more does high effort cost for Claude Sonnet 5.5?
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.