Anthropic · Released Oct 15, 2025Claude Haiku 4.5
Fast Claude lane for lightweight agents, office tasks, and responsive chat.
- Capability
- 142.4ECI · #90 of 148
- Input
- $1.00per 1M tokens
- Output
- $5.00per 1M tokens
- Context
- 200K64K max output
What it costs
- Input
- $1.00per million tokens
- Output
- $5.00per million tokens
- Cached input
- $0.10per million tokens
- Cache write
- $1.25per million tokens
- Blended (3:1)
- $2.00pricier than 70% of priced models
Typical monthly bills
| Monthly usage | Estimated cost |
|---|---|
| Side project2M input + 0.5M output tokens | $4.50 |
| Team assistant25M input + 5M output tokens | $50.00 |
| Production app250M input + 50M output tokens | $500.00 |
Official Anthropic API price, as listed on models.dev.
Independent benchmarks
#90 of 148 scored models
The shaded band is Epoch AI’s confidence range (139.5–144.3); the tick marks the median scored model.
Scores from Epoch AI, run independently of Anthropic.
The details
- Lab
- Anthropic
- Released
- Oct 15, 2025
- Knowledge cutoff
- Feb 28, 2025
- Context window
- 200,000 tokens
- Max output
- 64,000 tokens
- Inputs
- Text, Images, PDFs
- Output
- Text
- Reasoning
- Thinking budget
- Tool calling
- Yes
- Structured output
- Yes
- Weights
- Proprietary
- API model ID
claude-haiku-4-5on Anthropic- Availability
- 34 API providerslisted on models.dev
What Anthropic claims
Published by the lab at launch. Settings vary, so compare these only with care.
| Benchmark | Score | Setting | Source |
|---|---|---|---|
| SWE-Bench Pro | 39.45 resolve rate | — | Source |
More from Anthropic
About Claude Haiku 4.5
How much does Claude Haiku 4.5 cost?
Claude Haiku 4.5 costs $1.00 input / $5.00 output per million tokens (official Anthropic API price). Cached input is $0.10 per million tokens, and writing to the cache costs $1.25. At a 3:1 input-to-output mix that is $2.00 per million tokens, more expensive than 70% of the 360 priced models we track.
What is the context window of Claude Haiku 4.5?
Claude Haiku 4.5 accepts up to 200,000 tokens per request and can write up to 64,000 tokens in one response.
How good is Claude Haiku 4.5?
Epoch AI gives Claude Haiku 4.5 a Capabilities Index score of 142.4 (likely range 139.5–144.3), ranking it #90 of 148 models Epoch has scored. Epoch AI benchmark results: GPQA Diamond 71.2%, OTIS Mock AIME 2024–2025 66.7%, SimpleQA Verified 13.2%.
Is Claude Haiku 4.5 open source?
No. Claude Haiku 4.5 is proprietary; you use it through Anthropic’s API or partner platforms.
What inputs does Claude Haiku 4.5 support?
Claude Haiku 4.5 accepts text, images and PDFs and replies in text. It is a reasoning model, supports tool calling and can return structured JSON output.
When was Claude Haiku 4.5 released?
Anthropic released Claude Haiku 4.5 on Oct 15, 2025. Its training data runs to Feb 28, 2025.
What are the best alternatives to Claude Haiku 4.5?
The closest current models from other labs on capability, price and release date are Qwen3 Max (Alibaba (Qwen), ECI 142.4, $1.20 / $6.00), GLM-4.7 (Z.ai (Zhipu), ECI 143.5, $0.60 / $2.20), Mistral Medium 3.5 (Mistral AI, ECI 141.4, $1.50 / $7.50) and Kimi K2 Thinking (Moonshot AI, ECI 146.0, $0.60 / $2.50).