Claude Opus 4.5 vs Claude Sonnet 4.6
Claude Sonnet 4.6 is 1.7× cheaper on input tokens than Claude Opus 4.5. Claude Sonnet 4.6 has a longer context window (1M vs 200K). Both models are accessible via the haimaker.ai OpenAI-compatible API at https://api.haimaker.ai/v1.
Claude Opus 4.5
anthropic/claude-opus-4-5-20251101
Claude Sonnet 4.6
anthropic/claude-sonnet-4-6
Side-by-side specifications
| Spec | Claude Opus 4.5 | Claude Sonnet 4.6 |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Full ID | anthropic/claude-opus-4-5-20251101 | anthropic/claude-sonnet-4-6 |
| Mode | chat | chat |
| Parameters | N/A | N/A |
| Context window | 200K | 1M |
| Max output | 64K | 64K |
| Input price (per 1M) | $5.00 | $3.00 |
| Output price (per 1M) | $25.00 | $15.00 |
| License | N/A | N/A |
| Architecture | N/A | N/A |
Feature support
| Feature | Claude Opus 4.5 | Claude Sonnet 4.6 |
|---|---|---|
| Function Calling | ✓ Supported | ✓ Supported |
| Reasoning | ✓ Supported | ✓ Supported |
| Vision | ✓ Supported | ✓ Supported |
Frequently asked questions
Which is cheaper, Claude Opus 4.5 or Claude Sonnet 4.6?
Claude Sonnet 4.6 is cheaper at $3.00 per 1M input tokens vs $5.00 for Claude Opus 4.5.
Which has the larger context window, Claude Opus 4.5 or Claude Sonnet 4.6?
Claude Sonnet 4.6 accepts up to 1M input tokens vs 200K for Claude Opus 4.5.
Can I use both Claude Opus 4.5 and Claude Sonnet 4.6 via the same API?
Yes. haimaker.ai exposes both anthropic/claude-opus-4-5-20251101 and anthropic/claude-sonnet-4-6 on the same OpenAI-compatible endpoint at https://api.haimaker.ai/v1, so you can switch between them by changing the model parameter in your request.
Try Claude Opus 4.5 or Claude Sonnet 4.6 via the haimaker API
One OpenAI-compatible endpoint. Switch between them by changing the model parameter.