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Claude Sonnet 5.5 vs GPT-6 Astra

Find the right model, side by side.

Across 16 shared evaluation tracks, Claude Sonnet 5.5 leads on 9, GPT-6 Astra leads on 7, and 0 are tied. These counts describe reported scores within matched setups, not an overall model ranking. At the initially selected providers, input/output prices are $2.00 / $10.00 for Claude Sonnet 5.5 and $10.00 / $50.00 for GPT-6 Astra, per million tokens.

Updated: Data as of:
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Model specifications

Specifications for Claude Sonnet 5.5 and GPT-6 Astra. Prices and performance use the selected provider offering.
SpecificationsClaude Sonnet 5.5AnthropicGPT-6 AstraOpenAI
Provider
Context sizetokens1,000,0001,000,000
Cutoff dateNot reported2026-04-30
Input costUSD / 1M tokens$2.00$10.00
Output costUSD / 1M tokens$10.00$50.00
Max outputtokens128,000128,000
LatencyTTFT · seconds514.907365.127
Speedtokens / sec139.30870.564

Benchmark performance

16 shared benchmark comparisons. Versions and setups matched.

Claude Sonnet 5.5GPT-6 Astra

GDPval-AA

2.1 ↗
  1. Claude Sonnet 5.5: 1,837.82 Elo
  2. GPT-6 Astra: 1,583.69 Elo