Anthropic
Anthropic Claude model for long-running agentic coding and knowledge work.
1M ctxUSD 4 / 1M input tok; USD 20 / 1M output tok
Introducing Claude Haiku 4.5AnthropicReleased October 1, 2025
Claude Haiku 4.5
The fastest model in Anthropic’s current fleet with near-frontier intelligence and extended thinking capabilities.
text-to-textProprietary API$1.00 / 1M tok (Near-Frontier Speed)Context: 200K (200,000 tokens)Arena ELO: 1350
Technical Specifications
Architecture Type
High-Efficiency Compact Reasoning Transformer
Total Parameters
High-Speed Efficient Scale
Context Window
200K (200,000 tokens)
Max Output Tokens
64K (64,000 tokens)
Knowledge Cutoff
February 2025
Supported Modalities
text, code, vision, reasoning
License & Access
Anthropic Commercial Terms
Benchmark Evaluations
Mmlu Pro
76.4
Humaneval
91.5
Gpqa Diamond
65.2
Swe Bench Verified
63.8
Chatbot Arena ELO
1350
Deep Architectural Overview
Claude Haiku 4.5 offers rapid execution for real-time customer-facing agents, high-volume classification, and sub-agent orchestration. It supports extended thinking and full 200k context windows at only $1/MTok input.
Strengths & Considerations
Core Strengths
- Fastest generation speeds in the active Claude catalog
- Extended thinking support for difficult problems
- Affordable $1 / $5 pricing with $0.10 cache hits
Known Limitations
- Adaptive thinking default not supported (extended thinking explicitly requested)
Token & API Pricing
Input Tokens (1M)$1.00
Output Tokens (1M)$5.00
Cached Input (1M)$0.1000
Batch API Discount50% Off Standard
Pricing is verified directly against Anthropic's developer documentation and API rate sheets.
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