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Claude Haiku 4.5 vs GPT-5.1
Comprehensive side-by-side LLM comparison
GPT-5.1 leads with 9.0% higher average benchmark score. Claude Haiku 4.5 is available on 3 providers. Overall, GPT-5.1 is the stronger choice for coding tasks.
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Anthropic
Claude Haiku 4.5, released by Anthropic in October 2025, is a fast, efficient large language model from the Claude 4.5 family optimized for high-throughput, low-latency workloads. It features a 200K token context window, 64K maximum output tokens, native image understanding, and extended thinking capabilities. Haiku 4.5 targets latency-sensitive applications such as real-time assistants, document classification, and lightweight agentic tasks where rapid response times are a primary requirement.
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OpenAI
GPT-5.1, released by OpenAI in November 2025, is a large language model from the GPT-5 family that delivers incremental improvements in reasoning, instruction following, and multimodal understanding over GPT-5. It features a 400K token context window and targets general-purpose development, long-context analysis, and agentic workflows.
1 month newer
Claude Haiku 4.5
Anthropic
2025-10-01
GPT-5.1
OpenAI
2025-11
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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Claude Haiku 4.5
Average Score:73.2%
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GPT-5.1
Average Score:82.2%(+9.0%)
Performance comparison across key benchmark categories
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Claude Haiku 4.5
Science73.0%
Coding73.3%
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GPT-5.1
Science
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Knowledge Cutoff
Training data recency comparison
Claude Haiku 4.5
2025-02
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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Claude Haiku 4.5
3 providers
Anthropic
AWS Bedrock
Google Cloud Vertex AI
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GPT-5.1
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Claude Haiku 4.5
Avg Score:73.2%
Providers:3
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GPT-5.1
Avg Score:82.2%(+9.0%)
Providers:0