Claude Haiku 4.5
AnthropicReleased Oct 15, 2025
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. Matching Claude Sonnet 4’s performance...
- Context window
- 200K tokens
- Max output
- 64K tokens
- Input
- text, image, file
- Output
- text
- Tokenizer
- Claude
- Released
- Oct 15, 2025
- Reasoning
- optional
Pricing
Per 1M tokens. The provider price and our flat 3% fee are separate columns — what you pay is their sum.
| Per 1M tokens | Provider | + 3% fee | You pay |
|---|---|---|---|
| Input | $1.00 | $0.030 | $1.03 |
| Output | $5.00 | $0.150 | $5.15 |
| Cache read | $0.100 | $0.0030 | $0.103 |
| Cache write | $1.25 | $0.037 | $1.29 |
Benchmarks
Artificial Analysis
- Intelligence index
- 29.6
- Coding index
- 43.9
- Agentic index
- 16.4
Design Arena
| Category | Elo | Win rate | Rank |
|---|---|---|---|
| 3Dmodels | 1149 | 41.2% | #63 |
| ASCII artmodels | 1187 | 49.3% | #30 |
| Codemodels | 1164 | 44.8% | #63 |
| Data vizmodels | 1168 | 45.6% | #59 |
| Game devmodels | 1162 | 44.6% | #60 |
| SVGmodels | 1083 | 39.1% | #56 |
| UI componentsmodels | 1155 | 42.7% | #60 |
| Websitesmodels | 1164 | 45% | #64 |
Head-to-head preference voting. How we filter and rank
Supported parameters
- include_reasoning
- max_tokens
- reasoning
- response_format
- stop
- structured_outputs
- temperature
- tool_choice
- tools
- top_k
- top_p
Call it
OpenAI-compatible: point your SDK at api.openkey.ai/v1 and use model anthropic/claude-haiku-4.5.
curl https://api.openkey.ai/v1/chat/completions \
-H "Authorization: Bearer $OPENKEY_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "anthropic/claude-haiku-4.5",
"messages": [{"role": "user", "content": "Hello"}]
}'import os
from openai import OpenAI
client = OpenAI(
base_url="https://api.openkey.ai/v1",
api_key=os.environ["OPENKEY_API_KEY"],
)
completion = client.chat.completions.create(
model="anthropic/claude-haiku-4.5",
messages=[{"role": "user", "content": "Hello"}],
)
print(completion.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.openkey.ai/v1",
apiKey: process.env.OPENKEY_API_KEY,
});
const completion = await client.chat.completions.create({
model: "anthropic/claude-haiku-4.5",
messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);Questions
- How much does Claude Haiku 4.5 cost via API?
- Through OpenKey, Claude Haiku 4.5 costs $1.03 per 1M input tokens and $5.15 per 1M output tokens. That is the provider price ($1.00 / $5.00) plus a flat 3% fee — nothing else.
- What is Claude Haiku 4.5's context window?
- Claude Haiku 4.5 accepts up to 200K tokens of context and returns up to 64K tokens per request.
- Is Claude Haiku 4.5 OpenAI-compatible?
- Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "anthropic/claude-haiku-4.5" using any OpenAI SDK — only the base URL and API key change.
- What inputs does Claude Haiku 4.5 support?
- Claude Haiku 4.5 accepts text, image, file input and produces text output.
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