GPT-5.5 vs Claude Sonnet 5
Rank, tier, score and price side by side, from our weekly rankings. Scores are editorial opinion based on public sources.
A
GPT-5.5
B
Claude Sonnet 5
- ProviderOpenAIAnthropic
- Rank#23#20Higher rank
- TierAA
- Score84.084.8Higher score
- PriceAPI $5 input / $30 output per 1M tokensAPI $2 input / $10 output per 1M tokens (legacy model)Lower price tier
- TaglineOpenAI's April 2026 flagship for complex professional and agentic coding work, since followed by the GPT-5.6 family (July 2026) and GPT-6 Astra (September 2026).Anthropic's June 2026 Sonnet model for large-scale coding and agentic work, now a legacy model succeeded by Sonnet 5.5 (September 2026) at the same price.
| Attribute | GPT-5.5 | Claude Sonnet 5 |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Rank | #23 | #20Higher rank |
| Tier | A | A |
| Score | 84.0 | 84.8Higher score |
| Price | API $5 input / $30 output per 1M tokens | API $2 input / $10 output per 1M tokens (legacy model)Lower price tier |
| Tagline | OpenAI's April 2026 flagship for complex professional and agentic coding work, since followed by the GPT-5.6 family (July 2026) and GPT-6 Astra (September 2026). | Anthropic's June 2026 Sonnet model for large-scale coding and agentic work, now a legacy model succeeded by Sonnet 5.5 (September 2026) at the same price. |