Claude Sonnet 4.6 vs GPT 5.4
Direct comparison between anthropic and openai for chat models. Specs, prices, strengths, weaknesses — decide on facts.
At a glance
- · Cheaper: GPT 5.4
- · Longer context window: GPT 5.4 at 400,000 tokens
- · Claude Sonnet 4.6: Best-in-class for code refactoring and multi-step pull requests
- · GPT 5.4: Better tool-use accuracy than GPT-5.3 with shorter outputs
Spec comparison
| Spec | Claude Sonnet 4.6 | GPT 5.4 |
|---|---|---|
| Provider | anthropic | openai |
| Input per 1M tokens | $3.00 / 1M | $2.50 / 1M |
| Output per 1M tokens | $15.00 / 1M | $15.00 / 1M |
| Context window | 200,000 tok | 400,000 tok |
| Max output | 64,000 tok | 16,384 tok |
| Knowledge cutoff | 2025-07 | 2026-01 |
| Vision | ||
| Tool calling | ||
| JSON mode | ||
| Structured output | ||
| Reasoning |
Claude Sonnet 4.6 — strengths
- +Best-in-class for code refactoring and multi-step pull requests
- +Very stable tool-use loops — low hallucination on arguments
- +64k output tokens fit whole files in one response
GPT 5.4 — strengths
- +Better tool-use accuracy than GPT-5.3 with shorter outputs
- +Native vision for screenshots, charts, and documents
- +400k context — fits code repos and long conversations
Claude Sonnet 4.6 — weaknesses
- −Knowledge cutoff July 2025 — no recent web knowledge
- −No native JSON mode — schema enforcement via tool-call trick
GPT 5.4 — weaknesses
- −Pricier per token than Sonnet 4.6 at comparable coding quality
- −Reasoning mode noticeably increases latency over standard calls