Claude Haiku 4.5 — reviews, specs & pricing

Anthropic's fast, low-cost model.

Summary

Claude Haiku 4.5 is optimized for speed and affordability while retaining solid reasoning ability inherited from the Claude 4 family. It supports a 200k context window. It's suited for latency-sensitive, high-volume tasks.

Sample use case

Used for chat support, content moderation, and lightweight agent tasks. Ideal where response time and cost matter more than peak capability.

Specifications

  • Provider: anthropic
  • License: closed
  • Context: 200k tokens
  • Input price: $1/M tok
  • Output price: $5/M tok
  • Released: 2025-10-15

Pros

  • Low latency
  • Affordable
  • Vision support

Cons

  • Lower ceiling than Sonnet/Opus
  • Closed weights
  • Less suited for deep reasoning

Average rating 0.0 from 0 community reviews on Reviuws.

Benchmark results

BenchmarkScoreLatency
MMLU-Pro80.0%—
AIME 202478.0%—
SWE-bench Verified73.3%—
GPQA Diamond73.3%—

Measured by the Reviuws Bench suite on identical prompts. Compare these scores against every other model.

Frequently asked questions

What is Claude Haiku 4.5?

Claude Haiku 4.5 is optimized for speed and affordability while retaining solid reasoning ability inherited from the Claude 4 family. It supports a 200k context window. It's suited for latency-sensitive, high-volume tasks.

How much does Claude Haiku 4.5 cost?

Claude Haiku 4.5 costs $1 per million input tokens and $5 per million output tokens.

Is Claude Haiku 4.5 open source?

Claude Haiku 4.5 is released under the closed license.