Price comparison · checked October 12, 2026

Claude Opus 5.5 vs GPT-6 Astra pricing

For a typical support chatbot (60,000 conversations a month), Claude Opus 5.5 costs $720 a month and GPT-6 Astra costs $1,800. That makes Claude Opus 5.5 2.5× cheaper for this workload.

Claude Opus 5.5GPT-6 Astra
ProviderAnthropicOpenAI
Input / 1M$4.00$10.00
Cached input / 1M$0.20$1.00
Output / 1M$20.00$50.00
Context window1M1.05M
Notes–Short-context rate

Monthly cost by workload

WorkloadClaude Opus 5.5GPT-6 AstraDifference
Support chatbot
60,000 req · 1,500 in / 300 out
$720$1,800Claude Opus 5.5 2.5× cheaper
Document summaries
20,000 req · 6,000 in / 400 out
$640$1,600Claude Opus 5.5 2.5× cheaper
Coding assistant
30,000 req · 4,000 in / 800 out
$960$2,400Claude Opus 5.5 2.5× cheaper
RAG search
100,000 req · 2,500 in / 250 out
$1,500$3,750Claude Opus 5.5 2.5× cheaper

Standard rates, no caching or batch discounts. Sources: developers.openai.com · platform.claude.com

Try your own numbers

Start from a use case

1,000 tokens is about 750 English words. Input includes your system prompt, chat history and any retrieved documents.

Claude Opus 5.5
AnthropicCheapest
$720 /mo
GPT-6 Astra
OpenAI
$1,800 /mo

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