Claude Fable 5.1 vs GPT-6 Astra
GPT-6 Astra costs less on both: $3.00 in and $15.00 out per million tokens, against $6.00 in and $30.00 out for Claude Fable 5.1. Both on one key at UplinkSwitch, each next to its developer's list price.
Prices · per million tokens, USD
| Tokens | Claude Fable 5.1claude-fable-5.1 | GPT-6 Astragpt-6-astra |
|---|---|---|
| Input | $6.00Anthropic lists $10.00 · 40% under | $3.00OpenAI lists $10.00 · 70% under |
| Cached input | $0.15Anthropic lists $0.25 · 40% under | $0.30OpenAI lists $1.00 · 70% under |
| Output | $30.00Anthropic lists $50.00 · 40% under | $15.00OpenAI lists $50.00 · 70% under |
| Formats | Anthropic SDK, OpenAI SDK | OpenAI SDK |
| Developer | Anthropic | OpenAI |
List price: each developer's published rate, read October 2026. A model with no cached rate bills cached tokens at its input rate. Live from GET https://api.uplinkswitch.com/v1/catalog.
Same key, same URL
One base URL and one key serve both models. The request below calls Claude Fable 5.1; put gpt-6-astra in the model field to call GPT-6 Astra instead.
shell
curl https://api.uplinkswitch.com/v1/chat/completions \
-H "authorization: Bearer sk-uplink-live-..." \
-H "content-type: application/json" \
-d '{"model":"claude-fable-5.1","messages":[{"role":"user","content":"Hello"}]}'Model pages: Claude Fable 5.1, GPT-6 Astra. Pricing by family: Claude, GPT. More comparisons: Claude Fable 5.1 vs Claude Opus 5.5, GPT-6 Astra vs GPT-6 Sol.
Questions
- Which costs less, Claude Fable 5.1 or GPT-6 Astra?
- GPT-6 Astra costs less on both: $3.00 in and $15.00 out per million tokens, against $6.00 in and $30.00 out for Claude Fable 5.1.
- Can I switch between them by changing the model id?
- Yes. Both answer in the OpenAI SDK format at the same base URL with the same key. Change the model id from claude-fable-5.1 to gpt-6-astra and nothing else.
- Is there a subscription?
- No. Prepaid credit from $10, with no subscription or monthly fee. Each top-up locks your prices for 30 days.