import requests r = requests.post( "https://api.aimlapi.com/v1/chat/completions", headers={"Authorization": "Bearer " + AIMLAPI_KEY}, json={ "model": "anthropic/claude-opus-4.1", "messages": [ { "role": "user", "content": "Hello!" } ] }, ) print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/chat/completions", { method: "POST", headers: { Authorization: `Bearer ${process.env.AIMLAPI_KEY}`, "Content-Type": "application/json", }, body: JSON.stringify({ "model": "anthropic/claude-opus-4.1", "messages": [ { "role": "user", "content": "Hello!" } ] }), }); console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/chat/completions \ -H "Authorization: Bearer $AIMLAPI_KEY" \ -H "Content-Type: application/json" \ -d '{"model":"anthropic/claude-opus-4.1","messages":[{"role":"user","content":"Hello!"}]}'
OpenAI-compatible — swap the base URL and it works with your existing SDK.
| Type | Price |
|---|---|
| Input | |
| Output | |
| Cached input |
| Benchmark | Score | What it measures | Source | Retrieved |
|---|---|---|---|---|
| Tau-bench | 56% | Tool-use agents in realistic customer-service tasks | Source | July 8, 2026 |
| AIME 2025 | 78% | Competition mathematics (AIME), 2025 | Source | July 8, 2026 |
| GPQA Diamond | 80.9% | Google-proof graduate science questions (hardest subset) | Source | July 8, 2026 |
| SWE-bench Verified | 74.5% | Resolving verified real GitHub issues | Source | July 8, 2026 |
| Model | Input | Output | Context | Best for |
|---|---|---|---|---|
Claude Opus 4.1 This page | Chat + assistants | |||
| Reasoning + agents | ||||
| Balanced coding + agents | ||||
| Long-context, multimodal & agentic workflows | ||||
| Reasoning + agents |
Claude Opus 4.1 has a 200,000 tokens context window and can return up to 32,000 tokens.
Claude Opus 4.1 takes text as input and returns text.
Use anthropic/claude-opus-4.1 as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.
Claude Opus 4.1 is priced at input $20.631 / 1M tokens, output $97.5 / 1M tokens, cached input $2.0631 / 1M tokens.
Yes, Claude Opus 4.1 can stream responses as they are generated.
Claude Opus 4.1 was built by Anthropic.