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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#103Software & IT Services#104Writing, Literature, & Language#112
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
Throughput81 tok/s
Latency0.78s
Mercury 2.5 is the fastest reasoning LLM, and the latest diffusion LLM (dLLM) from Inception.
AuthorInception
Country🇺🇸 United States
ReleasedSep 8, 2026
Overview
Cost rate
0.1x
Context
260K
Input
Output
Reasoning
Tool calling
Structured outputs
Pricing/M tokens
Input$0.04
Cached input$0.00
Output$0.15
Context
Context length260,000
Max output tokens65,536
Knowledge cutoff-
Performance
Throughput-
Latency-
Benchmarks
Head-to-head scores across reasoning, coding, and agentic indices, plus per-domain rankings.
Intelligence
53.4
Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)
Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)52.8
GPT-6 Astra (max)
GPT-6 Astra (max)50.7
