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Specifications
Context windowHow much information the model can work with in one request, measured in tokens — pieces of words or other data. This includes your question, attachments, conversation and reply. Limits can vary by model variant and provider.
1M262k
API pricingUSD per 1M tokens · lower wins
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it.
$8.00—
Output priceWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one.
$40.00—
Cached input priceA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again.
$0.20—
$3,600Anthropic list price—
Benchmarks
Humanity's Last Exam · with toolsMultidisciplinary reasoning — Humanity's Last Exam — extremely hard expert questions across many subjects. “With tools” means the AI is allowed to search the web or run code while answering. Higher is better.
74.2%35.9%
Overview
CompanyAnthropicQwen
Release dateNov 9 2026Aug 26 2026
AccessClosedOpen Weight
Model detailsView modelView model

Frequently asked questions

Claude Fable 5.2 leads Qwen3.8-Flash-Next on 1 of the 1 benchmark they both report (Humanity's Last Exam). Only Claude Fable 5.2 has a verified first-party price for an available API: $8.00 per million input tokens and $40.00 per million output tokens. No currently available pay-as-you-go API rate is tracked for Qwen3.8-Flash-Next. Qwen3.8-Flash-Next shipped 75 days before Claude Fable 5.2, so benchmark comparisons should account for the intervening progress.

Context windows are 1M (Claude Fable 5.2) vs 262k (Qwen3.8-Flash-Next). Claude Fable 5.2 is closed, while Qwen3.8-Flash-Next is open weight.

On Humanity's Last Exam · with tools, Claude Fable 5.2 leads at 74.2% vs Qwen3.8-Flash-Next at 35.9%.