anthropic/claude-haiku-4.5Claude Haiku 4.5 is Anthropic’s proprietary AI model, released Oct 15, 2025. It costs $1/M input and $5/M output tokens, and handles a 200K-token context window.
Claude Haiku 4.5 is Anthropic’s fastest and most efficient model, delivering near-frontier intelligence at a fraction of the cost and latency of larger Claude models.
Scores on standardized evaluations. Higher is better — and rank shows where Claude Haiku 4.5 lands among all models tracked on Model Beat.
Abstract visual reasoning
Harder abstract reasoning
Graduate-level scientific reasoning
Factual accuracy & hallucination
Novel ML problem-solving
Human-rated web development
Olympiad-qualifier math
Research-level math problems
Hardest research math
Hardest competition math
Multi-step agentic tasks
Command-line agentic tasks
Claude Haiku 4.5 is Anthropic’s fastest and most efficient model, delivering near-frontier intelligence at a fraction of the cost and latency of larger Claude models.
Claude Haiku 4.5 is an AI model developed by Anthropic, part of the Claude family, released Oct 15, 2025.
Claude Haiku 4.5's list price from Anthropic is $1 per million input tokens and $5 per million output tokens.
Claude Haiku 4.5 supports a context window of up to 200K tokens.
On standardized evaluations tracked by Epoch AI, Claude Haiku 4.5 scores 45.4% on WeirdML, 35.5% on Terminal-Bench, 96.4% on MATH Level 5.
Claude Haiku 4.5 is a proprietary model (API access), available through its provider's API rather than as a downloadable open-weight model.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Jul 30, 2026.