Price comparison · checked October 12, 2026

Claude Fable 5.1 vs GPT-6 Astra pricing

For a typical support chatbot, Claude Fable 5.1 and GPT-6 Astra cost the same: $1,800 a month.

Claude Fable 5.1GPT-6 Astra
ProviderAnthropicOpenAI
Input / 1M$10.00$10.00
Cached input / 1M$0.25$1.00
Output / 1M$50.00$50.00
Context window1M1.05M
Notes–Short-context rate

Monthly cost by workload

WorkloadClaude Fable 5.1GPT-6 AstraDifference
Support chatbot
60,000 req · 1,500 in / 300 out
$1,800$1,800Same
Document summaries
20,000 req · 6,000 in / 400 out
$1,600$1,600Same
Coding assistant
30,000 req · 4,000 in / 800 out
$2,400$2,400Same
RAG search
100,000 req · 2,500 in / 250 out
$3,750$3,750Same

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 Fable 5.1
AnthropicCheapest
$1,800 /mo
GPT-6 Astra
OpenAICheapest
$1,800 /mo

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