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Claude Sonnet 5.5 vs GPT-6 Astra pricing

Prices

Claude Sonnet 5.5 and GPT-6 Astra prices, USD per 1M tokens
USD per 1M tokensClaude Sonnet 5.5GPT-6 Astra
Input$2.00$10.00
Output$10.00$50.00
Cache read$0.10$1.00
Cache write$2.50$12.50
Batch input$1.00$5.00
Batch output$5.00$25.00

Verified against the provider's official pricing page on Oct 9, 2026. Official pricing page

Monthly cost by workload

WorkloadClaude Sonnet 5.5GPT-6 Astra
Chatbot1,000 in / 500 out tokens, 10,000 requests a day$2,100/mo$10,500/mo
RAG8,000 in / 500 out tokens, 5,000 requests a day$3,150/mo$15,750/mo
Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input$1,320/mo$7,200/mo

Cost = input tokens × input price + output tokens × output price, 30 days a month. Cached input uses the cache read price. Cache write fees are not included.

Context and capabilities

Claude Sonnet 5.5GPT-6 Astra
Context1,000,000 tokens1,050,000 tokens
Max output128,000 tokens128,000 tokens
Inputtext, image, pdftext, image, pdf
Tool callingYesYes
ReasoningYesYes
Structured outputsYesYes

Questions

What is the price difference between Claude Sonnet 5.5 and GPT-6 Astra?
Claude Sonnet 5.5: $2.00 per 1M input tokens and $10.00 per 1M output tokens. GPT-6 Astra: $10.00 per 1M input tokens and $50.00 per 1M output tokens. For the Chatbot workload (1,000 in / 500 out tokens, 10,000 requests a day), that is about $2,100 per month for Claude Sonnet 5.5 and $10,500 for GPT-6 Astra.
Which has the longer context window, Claude Sonnet 5.5 or GPT-6 Astra?
GPT-6 Astra has the longer context window: up to 1,050,000 tokens, compared with 1,000,000 for Claude Sonnet 5.5.
Do Claude Sonnet 5.5 and GPT-6 Astra have prompt caching and batch prices?
Claude Sonnet 5.5: cached input $0.10 per 1M tokens; batch $1.00 per 1M input tokens and $5.00 per 1M output tokens. GPT-6 Astra: cached input $1.00 per 1M tokens; batch $5.00 per 1M input tokens and $25.00 per 1M output tokens.

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