Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback)
Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback) is strong in long context; capable in reasoning, factuality, and multimodal tasks; and behind the leaders in agentic tasks. Too few results yet to rate coding, safety, math, multilingual tasks, or instruction following.
Capability profile
Bars show the model's median result as a share of the leading model's, per capability. Select a row to see its results.
Too few results yet to rate Coding, Safety, Math, Multilingual or Instruction Following.
Price
$4.00input$20.00outputper million tokens
From Artificial Analysis · All prices
Evidence
11results on11benchmarks
- 11 aggregator
From 1 source · latest Oct 8, 2026 · How verification works
Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback) benchmark results
11 results on 11 benchmarks, grouped by capability. Each bar is the result as a share of the capability leader's; every result links to its source.
4.8% behind the leader1 of 3 ranked benchmarks measured
- 84.33Oct 8, 2026
18.5% behind the leader2 of 6 ranked benchmarks measured
- 27.71Oct 8, 2026
- Humanity's Last Exam54.73Oct 8, 2026aa_hle
20.9% behind the leader2 of 4 ranked benchmarks measured
- AA-Omniscience · Accuracy64.55Oct 8, 2026omniscienceAccuracy
- AA-Omniscience · Non-hallucination31.64Oct 8, 2026omniscienceNonHallucination
22.1% behind the leader1 of 6 ranked benchmarks measured
- MMMU-Pro85.72Oct 8, 2026aa_mmmu_pro
26.2% behind the leader2 of 7 ranked benchmarks measured
- Terminal-Bench 4.052.53Oct 8, 2026
- 54.31Oct 8, 2026
0 of 10 ranked benchmarks measured
- SciCode59.26Oct 8, 2026aa_scicode
More results
Benchmarks outside the capability baskets. They are not ranked against a leader.
- AA Intelligence51.24Oct 8, 2026aa_intelligence_index
- 40.32Oct 8, 2026
Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback): common questions
Who makes Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback)?
Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback) is made by Anthropic.
When was Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback) released?
Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback) was released on Sep 22, 2026, according to Anthropic's own announcement.
What is Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback) good at?
Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback) is strong in long context; capable in reasoning, factuality, and multimodal tasks; and behind the leaders in agentic tasks. Too few results yet to rate coding, safety, math, multilingual tasks, or instruction following.
How much does Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback) cost?
Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback) costs $4.00 per million input tokens and $20.00 per million output tokens, according to Artificial Analysis. At a mix of three input tokens to one output token, it costs more than 92% of the 330 priced models we track.
How many benchmarks has Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback) been tested on?
We track 11 results for Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback) on 11 benchmarks from 1 source. The latest was recorded on Oct 8, 2026.
About this record
Where Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback)'s numbers come from, and every name it appears under.
- Tracked since
- Sep 23, 2026
- Newest source mention
- Sep 29, 2026
Where the results come from
Verification: 11 scores · 0 independently verified · 11 aggregator-attributed. How these tiers are assigned
From 1 source on 1 site. Artificial Analysis supplies all of them. Bars are coloured by trust tier.
- artificialanalysis.ai11
Also known as
How our sources name Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback) at each reasoning setting.
| Setting | Long form |
|---|---|
| high | claude sonnet 5.5 (adaptive reasoning, high effort, default fallback) |
| xhigh | claude sonnet 5.5 (adaptive reasoning, xhigh effort, default fallback) |