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Claude Haiku 4.5 is Anthropic's fast, affordable small model in the Claude 4 generation, balancing strong instruction-following and coding ability with low latency. It is designed for high-throughput agentic and chat applications where speed and cost efficiency are priorities.
Document analysis#31Mathematical#100Software & IT Services#101Writing, Literature, & Language#110
AuthorAnthropic
Country🇺🇸 United States
ReleasedOct 15, 2025
Overview
Cost rate
1x
Context
200K
Input
Output
Reasoning
Tool calling
Structured outputs
Pricing/M tokens
Input$1.00
Cached input$0.10
Output$5.00
Context
Context length200,000
Max output tokens64,000
Knowledge cutoff-
Performance
Throughput94 tok/s
Latency0.78s
Free-tier variant of Poolside's Laguna S 2.1, an open-weight 118B MoE agentic coding model with a 1M-token context window trained via RL in Poolside's agent harness. Same underlying model as the paid version, suited for agentic software engineering and terminal/coding tasks.
AuthorPoolside
Country🇺🇸 United States
ReleasedJul 21, 2026
Overview
Cost rate
Free
Context
262K
Input
Output
Reasoning
Tool calling
Structured outputs
Pricing/M tokens
Input$0.00
Cached input$0.00
Output$0.00
Context
Context length262,144
Max output tokens32,768
Knowledge cutoff-
Performance
Throughput-
Latency-
Benchmarks
Head-to-head scores across reasoning, coding, and agentic indices, plus per-domain rankings.
Intelligence
62.5
Claude Opus 5 (Adaptive Reasoning, Xhigh Effort)
Claude Opus 5 (Adaptive Reasoning, Xhigh Effort)62.1Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback)
Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback)59.5
