Claude Sonnet 4.6 vs GPT-5.4 Pro
Claude Sonnet 4.6 and GPT-5.4 Pro are both current production-tier models. Claude Sonnet 4.6 is meaningfully cheaper at $3 / $15 per 1M. Claude Sonnet 4.6 has a 1M context window — about 3× the 400k of GPT-5.4 Pro. Claude Sonnet 4.6 leads on long-context retrieval. GPT-5.4 Pro leads on reasoning, general knowledge, multilingual.
Specs side by side
| Metric | Anthropic Claude Sonnet 4.6 | OpenAI GPT-5.4 Pro |
|---|---|---|
| Input price (per 1M) | $3 | $30 |
| Output price (per 1M) | $15 | $180 |
| Context window | 1M tokens | 400k tokens |
| Speed tier | balanced | slow |
| Open weights | No | No |
| EU region | Yes | No |
| Free tier | No | No |
| Prompt caching | Yes | Yes |
| Vision input | Yes | Yes |
| Extended thinking | Yes | Yes |
When to choose each
Choose Claude Sonnet 4.6 if…
- Cost is a priority ($3 / $15 per 1M vs $30 / $180 per 1M)
- You need 1M context (3× more than GPT-5.4 Pro)
- EU data residency is required
- Long-context retrieval is central to your workload
Choose GPT-5.4 Pro if…
- Reasoning is central to your workload
- General knowledge is central to your workload
Benchmark delta
Claude Sonnet 4.6 leads on
- Long-context retrieval
GPT-5.4 Pro leads on
- Reasoning
- General knowledge
- Multilingual
- Vision
FAQ — Claude Sonnet 4.6 vs GPT-5.4 Pro
Claude Sonnet 4.6 vs GPT-5.4 Pro — which is better?
Claude Sonnet 4.6 and GPT-5.4 Pro are both current production-tier models. Claude Sonnet 4.6 is meaningfully cheaper at $3 / $15 per 1M. Claude Sonnet 4.6 has a 1M context window — about 3× the 400k of GPT-5.4 Pro. Claude Sonnet 4.6 leads on long-context retrieval. GPT-5.4 Pro leads on reasoning, general knowledge, multilingual. The right pick depends on your use case — see "When to choose each" above for a data-driven decision.
How does Claude Sonnet 4.6 pricing compare to GPT-5.4 Pro?
Claude Sonnet 4.6 costs $3 / $15 per 1M vs GPT-5.4 Pro at $30 / $180 per 1M. Claude Sonnet 4.6 is cheaper on output tokens by roughly 1100%. Both support prompt caching, which reduces effective cost by 80-90% on repeat system prompts.
Does Claude Sonnet 4.6 or GPT-5.4 Pro have the bigger context window?
Claude Sonnet 4.6 has a 1M-token context window — 3× the 400k context of GPT-5.4 Pro. Enough for entire codebases, books, or multi-document RAG.
Is there a free tier for Claude Sonnet 4.6 or GPT-5.4 Pro?
Claude Sonnet 4.6: no — Free via Claude.ai web chat; API requires paid credits. GPT-5.4 Pro: no — Paid-only — no free tier.
Which is better for coding — Claude Sonnet 4.6 or GPT-5.4 Pro?
GPT-5.4 Pro leads on coding benchmarks (Claude Sonnet 4.6: 94/100, GPT-5.4 Pro: 96/100). For production coding agents also weigh tool-use performance — Claude Sonnet 4.6 scores 96, GPT-5.4 Pro scores 94.