$ diff astra claude-fable-5-1
Astra vs Claude Fable 5.1
Values come from Astra and Claude Fable 5.1, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing.
OpenAIAstra
- context
- 1.1M
- weights
- closed
- $/M in
- $10
- $/M out
- $50
- context
- 1M
- weights
- closed
- $/M in
- $10
- $/M out
- $50
What actually differs
- Context window
- Astra takes 1.1M against 1M — modestly more room in a single request.
- Recency
- Astra shipped 2 days after Claude Fable 5.1 (2026-09-03 vs 2026-09-01).
Full spec
| Attribute | Astra | Claude Fable 5.1 |
|---|---|---|
| Developer | OpenAI | Anthropic |
| Released | 2026-09-03 | 2026-09-01 |
| Context window | 1,050,000 tokens (128,000 max output) | 1M tokens |
| Pricing | $10/M input · $50/M output | $10/M input · $50/M output · cache reads $0.25/M |
| License | proprietary | proprietary (API-only; no weight release) |
| Availability | ChatGPT Plus, Pro, Business, Enterprise · OpenAI API · AWS — staged, see below | Claude API as `claude-fable-5-1`; plan-tier access is disputed — see `## Conflicting Reports` |