Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback)
Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) is strong in long context; and capable in factuality, reasoning, and agentic tasks. Too few results yet to rate coding, safety, math, multimodal tasks, 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, Multimodal, Multilingual or Instruction Following.
Price
$2.00input$10.00outputper million tokens
From Artificial Analysis · All prices
Evidence
30results on10benchmarks
- 30 aggregator
From 1 source · latest Oct 8, 2026 · How verification works
Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) benchmark results
30 results on 10 benchmarks, grouped by capability. Each bar is the result as a share of the capability leader's; every result links to its source.
7.5% behind the leader1 of 3 ranked benchmarks measured
- 82.67Oct 8, 2026
17.7% behind the leader2 of 4 ranked benchmarks measured
- AA-Omniscience · Accuracy53.95Oct 8, 2026omniscienceAccuracy
- AA-Omniscience · Non-hallucination52.99Oct 8, 2026omniscienceNonHallucination
Show 4 more factuality resultsHide 4 factuality results
- AA-Omniscience · Accuracy53.03Oct 8, 2026omniscienceAccuracy
- AA-Omniscience · Accuracy51.98Oct 8, 2026omniscienceAccuracy
- AA-Omniscience · Non-hallucination37.12Oct 8, 2026omniscienceNonHallucination
- AA-Omniscience · Non-hallucination35.37Oct 8, 2026omniscienceNonHallucination
17.7% behind the leader2 of 6 ranked benchmarks measured
- 31.43Oct 8, 2026
- Humanity's Last Exam54.96Oct 8, 2026aa_hle
Show 4 more reasoning resultsHide 4 reasoning results
- 31.14Oct 8, 2026
- 24.57Oct 8, 2026
- Humanity's Last Exam50.00Oct 8, 2026aa_hle
- Humanity's Last Exam45.83Oct 8, 2026aa_hle
22.1% behind the leader3 of 7 ranked benchmarks measured
- Terminal-Bench 4.063.64Oct 8, 2026
- 66.95Oct 8, 2026
Show 4 more agentic resultsHide 4 agentic results
- 61.53Oct 8, 2026
- 52.55Oct 8, 2026
- Terminal-Bench 4.057.07Oct 8, 2026
- Terminal-Bench 4.043.94Oct 8, 2026
0 of 10 ranked benchmarks measured
More results
Benchmarks outside the capability baskets. They are not ranked against a leader.
- 32.30Oct 8, 2026
- AA Intelligence56.00Oct 8, 2026aa_intelligence_index
- AA Intelligence51.90Oct 8, 2026aa_intelligence_index
- 23.50Oct 8, 2026
- AA Intelligence46.75Oct 8, 2026aa_intelligence_index
- 20.95Oct 8, 2026
Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback): common questions
Who makes Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback)?
Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) is made by Anthropic.
When was Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) released?
Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) was released on Sep 28, 2026, according to Anthropic's own announcement.
What is Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) good at?
Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) is strong in long context; and capable in factuality, reasoning, and agentic tasks. Too few results yet to rate coding, safety, math, multimodal tasks, multilingual tasks, or instruction following.
How much does Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) cost?
Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) costs $2.00 per million input tokens and $10.00 per million output tokens, according to Artificial Analysis. At a mix of three input tokens to one output token, it costs more than 82% of the 330 priced models we track.
How many benchmarks has Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) been tested on?
We track 30 results for Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) on 10 benchmarks from 1 source. The latest was recorded on Oct 8, 2026.
About this record
Where Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback)'s numbers come from, and every name it appears under.
- Tracked since
- Sep 29, 2026
- Newest source mention
- Oct 4, 2026
Where the results come from
Verification: 30 scores · 0 independently verified · 30 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.ai30
Also known as
How our sources name Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) at each reasoning setting.
| Setting | Short form |
|---|---|
| high | claude sonnet 5.5 (high, default fallback) |
| xhigh | claude sonnet 5.5 (xhigh, default fallback) |