Claude Haiku 5.5

anthropic/claude-haiku-5-5

Fast Claude model with 1M context, 128K maximum output, and Adaptive Thinking.

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Context window: 1M
Input: Image · Text
Output: Text
Released: 2026-10-07

Max output: 128K
Weights: Closed
Capabilities: Reasoning, Temperature, Tool call

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Performance

Overall capability

59.6/100

Coding: 58.1
Reasoning: 57.7
Professional work: 56.3
Knowledge & language: 57.2


Arena Agent Overall	Professional work	LMArena	2026-11-08
AA-Analyst AgentClaude Haiku 5.5 (Max)	Professional work	Artificial Analysis	2026-11-05
BullshitBench v2	Knowledge & language	BullshitBench	2026-11-05
Chess Puzzles	Reasoning	Epoch AI	2026-11-05
Harvey Legal Agent Benchmark	Professional work	Vals AI / Harvey	2026-11-05
SciCodeClaude Haiku 5.5 (Max)	Coding	Artificial Analysis	2026-11-05
SimpleQA Verified	Knowledge & language	Epoch AI	2026-11-05
AA-OmniscienceClaude Haiku 5.5 (Max)	Knowledge & language	Artificial Analysis	2026-11-05

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ModelRegistry · Catalog updated 2026-11-10