GPT 5.4 vs Claude Opus 4 5 20251101
GPT 5.4 is 2.0× cheaper on input tokens than Claude Opus 4 5 20251101. GPT 5.4 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.
GPT 5.4
openai/gpt-5.4
Chat
Function CallingVisionReasoning
Claude Opus 4 5 20251101
anthropic/claude-opus-4-5-20251101
Chat
Function CallingVisionReasoning
Side-by-side specifications
| Spec | GPT 5.4 | Claude Opus 4 5 20251101 |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Full ID | openai/gpt-5.4 | anthropic/claude-opus-4-5-20251101 |
| Mode | chat | chat |
| Parameters | N/A | N/A |
| Context window | 1M | 200K |
| Max output | 128K | 64K |
| Input price (per 1M) | $2.50 | $5.00 |
| Output price (per 1M) | $15.00 | $25.00 |
| License | N/A | N/A |
| Architecture | N/A | N/A |
Feature support
| Feature | GPT 5.4 | Claude Opus 4 5 20251101 |
|---|---|---|
| Function Calling | ✓ Supported | ✓ Supported |
| Reasoning | ✓ Supported | ✓ Supported |
| Vision | ✓ Supported | ✓ Supported |
Frequently asked questions
Which is cheaper, GPT 5.4 or Claude Opus 4 5 20251101?
GPT 5.4 is cheaper at $2.50 per 1M input tokens vs $5.00 for Claude Opus 4 5 20251101.
Which has the larger context window, GPT 5.4 or Claude Opus 4 5 20251101?
GPT 5.4 accepts up to 1M input tokens vs 200K for Claude Opus 4 5 20251101.
Can I use both GPT 5.4 and Claude Opus 4 5 20251101 via the same API?
Yes. haimaker.ai exposes both openai/gpt-5.4 and anthropic/claude-opus-4-5-20251101 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 GPT 5.4 or Claude Opus 4 5 20251101 via the haimaker API
One OpenAI-compatible endpoint. Switch between them by changing the model parameter.