Claude Opus 4.5 vs Gemini 2.5 Pro
Gemini 2.5 Pro is 4.0× cheaper on input tokens than Claude Opus 4.5. Gemini 2.5 Pro 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
Gemini 2.5 Pro
google/gemini-2.5-pro
Side-by-side specifications
| Spec | Claude Opus 4.5 | Gemini 2.5 Pro |
|---|---|---|
| Provider | Anthropic | |
| Full ID | anthropic/claude-opus-4-5-20251101 | google/gemini-2.5-pro |
| Mode | chat | chat |
| Parameters | N/A | N/A |
| Context window | 200K | 1M |
| Max output | 64K | 8K |
| Input price (per 1M) | $5.00 | $1.25 |
| Output price (per 1M) | $25.00 | $10.00 |
| License | N/A | N/A |
| Architecture | N/A | N/A |
Feature support
| Feature | Claude Opus 4.5 | Gemini 2.5 Pro |
|---|---|---|
| Function Calling | ✓ Supported | ✓ Supported |
| Reasoning | ✓ Supported | — |
| Vision | ✓ Supported | ✓ Supported |
Frequently asked questions
Which is cheaper, Claude Opus 4.5 or Gemini 2.5 Pro?
Gemini 2.5 Pro is cheaper at $1.25 per 1M input tokens vs $5.00 for Claude Opus 4.5.
Which has the larger context window, Claude Opus 4.5 or Gemini 2.5 Pro?
Gemini 2.5 Pro accepts up to 1M input tokens vs 200K for Claude Opus 4.5.
Can I use both Claude Opus 4.5 and Gemini 2.5 Pro via the same API?
Yes. haimaker.ai exposes both anthropic/claude-opus-4-5-20251101 and google/gemini-2.5-pro 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 Gemini 2.5 Pro via the haimaker API
One OpenAI-compatible endpoint. Switch between them by changing the model parameter.