API5 min readJuly 18, 2026
GPT-5.6 vs Claude Sonnet 5: API Pricing and Capability Comparison
Detailed API pricing comparison between OpenAI's GPT-5.6 family and Anthropic's Claude Sonnet 5. Includes Terra, Luna, and Sonnet 5 introductory pricing analysis.
Frequently Asked Questions
How much does GPT-5.6 API cost?
GPT-5.6 standard pricing is $2.50/$15 per 1M tokens (input/output). GPT-5.6 Luna (cheap variant) is $0.20/$1.20 per 1M — about 12x cheaper for most tasks. GPT-5.6 Terra is $2/$12 per 1M, a 20% reduction from the previous generation.
How much does Claude Sonnet 5 API cost?
Claude Sonnet 5 introductory price is $2/$10 per 1M tokens until August 31, 2026. After that, it returns to the standard $3/$15 per 1M. Claude Opus 4.8 is $5/$25 per 1M. Claude Haiku 4.5 is $1/$5 per 1M.
GPT-5.6Claude Sonnet 5API pricingLLM comparisonOpenAI vs Anthropic
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