Effort: max · Max
AnthropicReleased Oct 7, 2026
Claude Haiku 5.5
Measured performance
All leaderboards ↗Benchmark results
Effort: max · Max
GDPval-AA ↗2.1
1,618.33Effort: max · Max
AutomationBench-AA ↗AA Index 4.3.2 collection
35.41%Effort: max · Max
Effort: max · Max · Harness unreported
SciCode ↗AA Index 4.3.2 collection
54.98%AA · Under reviewEffort: max · Max
Humanity’s Last Exam ↗AA Index 4.3.2 collection
44.39%Effort: max · Max
GDP.pdf ↗AA Index 4.3.2 collection
20.8%Effort: max · Max
CritPt ↗AA Index 4.3.2 collection
18.86%AA · Under reviewEffort: max · Max
AA-Omniscience ↗AA Index 4.3.2 collection
10.67Effort: max · Max
AA-LCR ↗1.1
82.67%Effort: max · Max
Provider measurements
1 configurationSpeed
≈10K input tokens1 requestmedian / 72h
Artificial Analysis · first-party providers · serving endpoint not reported
Anthropic
Claude Haiku 5.5 (Max)
Reasoning max
- Output rate
- 234.137 tok/s
- Time to first chunk
- 244.84 s
Last checked Source ↗
Methodology 2.2.0 & measurement details
First chunk includes request processing and network time, and may include reasoning.
- Prompt
- long · ≈10,000 input tokens
- Parallel requests
- 1
- Minimum answer
- 1,500 tokens
- Aggregation
- median over 72 hours
- Token counting
- o200k_base
- Benchmark client
- Google Cloud us-central1-a
- Serving endpoint
- Not reported
- Serving region
- Not reported
- Sample size
- Not reported
- Window end
- Not reported
Access & cost
0 quotesPrices across providers
No listed provider price
Model specifications
- Developer
- Anthropic
- Modality
- Language
- Context
- 1,000,000 tokens
- Maximum output
- Not reported
- Weights
- Closed weights
- Released
- Oct 7, 2026
- First discovered
- Oct 16, 2026
Exact identities
- artificial-analysis
7d064a11-6e78-4030-b535-cdf940615041
Sources
Updated Oct 20, 2026
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