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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#42Software & IT Services#118Mathematical#120Writing, Literature, & Language#128
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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
Throughput83 tok/s
Latency0.49s

Free-tier variant of Poolside's Laguna XS 2.1, a compact open-weight MoE coding model designed for local agentic coding. Same underlying model as the paid version, aimed at lightweight, cost-effective code generation and tool-use tasks.

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AuthorPoolside
Country🇺🇸 United States
ReleasedJul 2, 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

57.6
Claude Opus 5.5 (Max, Default Fallback)
56.0
Claude Sonnet 5.5 (Max, Default Fallback)
55.1
Kimi K3.1 Pro
53.4
Claude Fable 5.1 (Max, Default Fallback)
52.7
GPT-6 Astra (Max)
16.9
Claude Haiku 4.5

Laguna XS 2.1 (free) has no data

Coding

81.6
Claude Fable 5.1 (Max, Default Fallback)
78.3
GPT-5.6 Sol (Xhigh)
78.0
Claude Opus 5 (Max)
77.1
GPT-6 Astra (High)
76.8
Grok 4.6 (High)
43.9
Claude Haiku 4.5

Laguna XS 2.1 (free) has no data

Automation & Tool Use

57.9
Claude Fable 5.1 (Max, Default Fallback)
56.5
Claude Opus 5 (Max)
56.0
Qwen3.8 Max (0902)
55.5
Muse Spark 1.3 (Max)
53.1
GLM-5.3 (Max)
8.0
Claude Haiku 4.5

Laguna XS 2.1 (free) has no data

Intelligence, coding & agentic scores from Artificial Analysis.

Software & IT Services

arena.ai
1549
Gemini 4 Argon (High)
1540
Claude Opus 4.7 (High)
1538
Claude Fable 5 (High)
1538
Claude Opus 5.5 (High)
1537
Claude Opus 4.6 (High)
1534
Muse Wonder (Max)
1532
Muse Spark 1.2 (xHigh)
1530
Claude Fable 5.1 (Max)
1528
GPT-6.1 Sol (Max)
1465
Claude Haiku 4.5

Laguna XS 2.1 (free) has no data

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