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OpenAI vs Anthropic

GPT-6 Astra vs Claude Fable 5.1: pricing comparison

GPT-6 Astra and Claude Fable 5.1 cost the same for a typical request. Here is how the two compare on price, context and discounts.

Prices last updated:

GPT-6 AstraClaude Fable 5.1
ProviderOpenAIAnthropic
Input per 1M tokens$10.00$10.00
Output per 1M tokens$50.00$50.00
Context window1.05M1M
Batch discount50% off50% off
Typical request (1,000 in / 500 out)$0.035$0.035
Monthly at 1,000 requests/day$1,050.00$1,050.00

GPT-6 Astra: OpenAI's flagship model, released September 2026.

Claude Fable 5.1: Anthropic's most capable widely released model.

Compare with your own numbers

GPT-6 Astra per request
$0.035
Per month
$1,050.00
Claude Fable 5.1 per request
$0.035
Per month
$1,050.00

Cost by task

Cost per 1,000 requests at standard prices.
TaskTokens (in / out)GPT-6 AstraClaude Fable 5.1
Short chat reply500 / 300$20.00$20.00
RAG answer6,000 / 600$90.00$90.00
Summarize a long document12,000 / 1,000$170.00$170.00
Output-heavy generation1,000 / 4,000$210.00$210.00

Output tokens usually dominate the bill — see input vs output token cost.

Frequently asked questions

Is GPT-6 Astra or Claude Fable 5.1 cheaper?
They cost the same for a typical 1,000-input, 500-output request: $0.035.
What are the per-token prices of GPT-6 Astra and Claude Fable 5.1?
GPT-6 Astra costs $10.00 input and $50.00 output per million tokens. Claude Fable 5.1 costs $10.00 input and $50.00 output per million tokens.
Which has the larger context window, GPT-6 Astra or Claude Fable 5.1?
GPT-6 Astra has the larger context window: 1.05M tokens versus 1M for Claude Fable 5.1.

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