Dated comparison: 3 September 2026
| Metric | Gemini 3.8 Flash | Claude Fable 5.1 |
|---|---|---|
| AA Intelligence Index | 59 | 66 |
| Output speed | ~305 tok/s | ~62 tok/s |
| Context window | 1,048,576 | Comparable |
| Standard input / 1M | $0.75 | ~$10 |
| Standard output / 1M | $3.75 | ~$50 |
| Cost per AA task | $0.58 | Higher |
| Weights | Closed | Closed |
| OneInfer availability | No (this reference page) | Yes |
How to choose
Pick Claude Fable 5.1 when you want the highest intelligence index currently served by OneInfer and the cost is justified. Pick Gemini 3.8 Flash when output speed and per-task cost dominate, and seven index points is a fair trade for a sixth of the bill. Fable 5.1 is the OneInfer-served option today; Gemini 3.8 Flash is not yet routed.
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These figures are transcribed from the 3 September 2026 research snapshot. The AA Intelligence Index is a composite, not a per-benchmark score. Fable 5.1 per-token prices are approximate ranges reported by third-party aggregators.
Frequently asked questions
How current is this information?
This page uses the verified research snapshot dated 3 September 2026. Verify current access, pricing and benchmark figures before a production decision.
Put Gemini 3.8 Flash to work
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