# Claude Opus 4.1 (20250805)

> August 2025 snapshot of Claude Opus 4.1, Anthropic's most capable model for complex tasks.

Agent resources: the index of everything machine-readable is https://www.ohmygpt.com/llms.txt; the integration skill (endpoints, auth, SDK and coding-tool setup) is https://www.ohmygpt.com/skill.md.

- Model ID: `anthropic/claude-opus-4-1-20250805`
- Status: stops working on 2027-01-08, use anthropic/claude-opus-4-8 instead
- Live status and providers as JSON, no key needed: https://api.ohmygpt.com/v1/models/anthropic/claude-opus-4-1-20250805
- Released: 2025-08-06
- Context: 200K tokens
- Max output: 32K tokens
- Input: text, image, pdf; output: text
- Knowledge cutoff: 2025-03-31
- Capability score: 145 (as of 2026-11-10, see https://www.ohmygpt.com/rankings.md)
- Human preference rating (LMArena text): 1419

## Prices (USD)

| Item | Price | Unit |
| --- | --- | --- |
| Input | $16.50 | per 1M tokens |
| Output | $82.50 | per 1M tokens |
| Cache read | $1.65 | per 1M tokens |
| Cache write (5 min) | $20.625 | per 1M tokens |
| Cache write (1 hour) | $33.00 | per 1M tokens |
| Web search | $0.011 | per request |

## Providers

Without a prefix each request goes to the best-priced healthy provider. To pin one, send the model as `<provider>:anthropic/claude-opus-4-1-20250805`.

| Provider | Pinned model ID | Location | Input | Output | Trains on your data |
| --- | --- | --- | --- | --- | --- |
| Amazon Bedrock | `bedrock:anthropic/claude-opus-4-1-20250805` | United States | $16.50 | $82.50 | no |
| Amazon Bedrock | `bedrock:anthropic/claude-opus-4-1-20250805` | United States | $16.50 | $82.50 | no |

## Endpoints

| API | Request | model |
| --- | --- | --- |
| OpenAI Chat | POST https://api.ohmygpt.com/v1/chat/completions | `anthropic/claude-opus-4-1-20250805` |
| OpenAI Responses | POST https://api.ohmygpt.com/v1/responses | `anthropic/claude-opus-4-1-20250805` |
| Anthropic Messages | POST https://api.ohmygpt.com/v1/messages | `anthropic/claude-opus-4-1-20250805` |
| Google Gemini | POST https://api.ohmygpt.com/v1/models/anthropic/claude-opus-4-1-20250805:generateContent | `anthropic/claude-opus-4-1-20250805` |

## Example

```bash
curl https://api.ohmygpt.com/v1/messages \
  -H "x-api-key: $OHMYGPT_API_KEY" \
  -H "Content-Type: application/json" \
  -H "anthropic-version: 2023-06-01" \
  -d '{
    "model": "anthropic/claude-opus-4-1-20250805",
    "max_tokens": 1024,
    "messages": [
      {
        "role": "user",
        "content": "Hello"
      }
    ]
  }'
```

Web page: https://www.ohmygpt.com/models/anthropic/claude-opus-4-1-20250805