Claude Haiku 5.5
Claude Haiku 5.5 has been Anthropic’s fastest model in the 5.5 family since early October 2026, built for high-volume tasks such as summarization, classification, browser use, and subagents. Context grows from 200,000 to one million tokens, output to 128,000, and average runtime costs are around 75 percent below Haiku 4.5. New to the Haiku class: adaptive reasoning with effort control. Text and image as input, proprietary, API-only.
- Proprietary
- Frontier
- Anthropic
- Text
- Vision
- Instruction-Tuned
- Real-Time
Sovereign Risk: MEDIUM The model is developed and operated by Anthropic, a US-based company. The ‘medium’ rating stems from the provider’s US jurisdiction. Laws such as the CLOUD Act could theoretically allow US authorities to access data processed on Anthropic’s servers. As this is a cloud-only model, this risk cannot be mitigated through local deployment. For users outside the US — particularly in jurisdictions with strict data protection requirements such as the GDPR — this represents a potential sovereignty risk.
Key metrics
Score · Latency · Cost · Quality
- Total Score Silver
- 77.33
- Routine
- 46.32
- Reasoning
- 31.01
- LLM Judge Avg
- 3.91 / 5
- 100 Coverage
- Avg Task Duration
- 13.6s
- Real-Time
- Token Rate
- 196.69tok/s
- Output Rate
- P95 Latency
- 42.99s
- Top 5 %
- Total Tokens
- 189600
- Output Volume
- Cost per 1K
- $0.0005
- USD / 1K Requests
- Benchmark Cost
- $0.09
- Total · 189600 tok
Benchmark modules
10 modules · weighted · vs. model median & top performer
Token efficiency & latency
Consumption per module vs. model median
Token consumption per module
Performance profile
Key metrics – legend
Score
- Total Score
- Overall score derived from Routine and Reasoning scores. Basis for the fleet rank and tier assignment (Gold / Silver / Bronze / Standard).
- Routine
- Score for standard tasks: code generation, text transformation, structured outputs. Weighted by task complexity.
- Reasoning
- Score for analytical and logical tasks: multi-step problem solving, mathematical reasoning, structured argumentation.
- Rank
- Position in the fleet comparison, sorted by Total Score. Refers to the snapshot at the time of testing.
LLM Judge
- LLM Judge Ø
- Average quality rating by an independent judge model on a scale of 1–5.
- Coverage
- Share of tasks for which a judge rating is available. 100% means all responses were evaluated.
Latency & speed
- Avg. Task Duration
- Average time per task from the first to the last token of the response, measured across all benchmark tasks.
- Token Rate
- Output speed in tokens per second. Relevant for interactive applications and real-time streaming.
- P95 Latency
- 95th percentile of response times — shows outliers. Lower values mean fewer long wait times in edge cases.
Cost
- Cost per 1K
- API price per 1,000 output tokens in US dollars. Basis for cost calculation in production use.
- Benchmark Cost
- Total cost for the complete benchmark run of this model.