Claude Haiku 4.5
Released
Claude Haiku 4.5 is an AI model released by Anthropic on Wednesday, Oct 15 2025, 16 days after Claude Sonnet 4.5. Benchmark results (shown below) cover BullshitBench v2, SWE-Bench Verified, and GPQA Diamond.
API pricing
- InputWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it.
- $1.00
- Cached inputA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again.
- $0.10
- 5 min cache writeA one-off charge for storing text so later requests can reuse it at the cheaper cached rate. This option keeps it for five minutes.
- $1.25
- 1 hr cache writeA one-off charge for storing text so later requests can reuse it at the cheaper cached rate. This option keeps it for an hour, so it costs more than the five-minute one.
- $2.00
- OutputWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one.
- $5.00
Available from
| Amazon Bedrock | global | $1.00 | $5.00 | 200K |
|---|---|---|---|---|
| Azure | global | $1.00 | $5.00 | 200K |
| global | $1.00 | $5.00 | 200K | |
| Amazon Bedrock | eu-west-1 | $1.10 | $5.50 | 200K |
| Amazon Bedrock | us | $1.10 | $5.50 | 200K |
| eu | $1.10 | $5.50 | 200K | |
| us-east5 | $1.10 | $5.50 | 200K |
Benchmarks
Coding
Reasoning & science
Robustness
About
Claude Haiku 4.5, released October 15, 2025, brought near-frontier coding to Anthropic's smallest, fastest tier. It scored 73.3% on SWE-Bench Verified — essentially matching Claude Sonnet 4, the mid-tier flagship from just five months earlier — at roughly a third of the cost and more than twice the speed.
That price-performance profile made Haiku 4.5 a popular choice for high-volume production workloads: sub-agents in orchestration systems, code review at scale, chat products with tight latency budgets. It also posted 73.0% on GPQA Diamond, territory that had belonged exclusively to flagship models a year earlier.
Compare Claude Haiku 4.5 with
Suggested comparisons
Frequently asked questions
Claude Haiku 4.5 was released by Anthropic on Wednesday, Oct 15 2025.
Claude Haiku 4.5 was built by Anthropic. AI safety company building the Claude family of models. Founded in 2021 by former OpenAI researchers.
Claude Haiku 4.5 costs $1.00 per million input tokens and $5.00 per million output tokens through the Anthropic API. Cached input is $0.10 per million tokens. Rates are pay-as-you-go API prices verified against Anthropic's published pricing on August 18, 2026.
Claude Haiku 4.5 reports 3 tracked benchmark scores — BullshitBench v2: 77%; SWE-Bench Verified: 73.3%; GPQA Diamond: 73%. Scores are the figures published at release by Anthropic.
No. Claude Haiku 4.5 is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.
Anthropic's previous tracked release was Claude Sonnet 4.5 on Sep 29 2025, 16 days earlier. It was followed by Claude Opus 4.5 on Nov 24 2025.