Model comparison
Compare Claude Fable 5.1 and Qwen3.8 Max using the same provider-sourced text & reasoning rubric. No mystery score and no invented benchmark ranking.
Facts checked September 4, 2026
Set your usage. Your estimate updates as you type.
Example: 6,000 input tokens for 10 pages, plus a 500-token summary. Page lengths vary; adjust the numbers below.
One run sends your input to the model once and receives an answer. Tokens are pieces of text: input is what you send, output is the answer you receive.
Estimates exclude taxes, tools, cache storage/writes, free allowances and custom discounts. Image estimates cover output only, not prompt or reference-image charges. Quality modes differ by model. Unlisted settings are not treated as free.
| Model | Access | Estimated total (USD) |
|---|---|---|
| Claude Fable 5.1Anthropic | Anthropic | $0.085 |
| Qwen3.8 MaxQwen | Qwen | No reviewed rate |
Quick take
Anthropic's frontier model for ambitious, long-running agentic and coding work, with strong vision and enterprise marketplace availability.
Confirm whether the default 30-day retention, fallback safeguards, and selected cloud marketplace meet your governance requirements before adoption.
Alibaba's frontier Qwen model for long-context reasoning, coding, tools, and understanding text, images, and video.
The moving alias and dated snapshots may not point to the same checkpoint on every provider. Pin a version where reproducibility matters and verify the live price for very long prompts.
Compare the published facts
Values use each provider's own published units and limits. A blank means the provider did not publish a directly comparable value in the sources reviewed.
| Text & reasoning | Claude Fable 5.1 | Qwen3.8 Max |
|---|---|---|
| Context windowMaximum combined prompt and working context documented by the provider. | 1M tokens | 1M tokens |
| Maximum outputProvider-published response limit, where available. | 128K tokens | Up to 131,072 tokens on OpenRouter |
| Knowledge cutoffLatest reliable knowledge date explicitly published by the model provider. Search and connected tools can retrieve newer information but do not change the model's built-in cutoff. | June 2026 | Not published |
| Input priceCurrent standard list price per million input tokens unless noted. | $10 / 1M | $2 / 1M on OpenRouter |
| Output priceCurrent standard list price per million output tokens unless noted. | $50 / 1M | $6 / 1M on OpenRouter |
| InputsMedia types accepted by the listed model endpoint. | Text, image, PDF | Text, image, video |
| Tools & agentsSelected native tools and agent-building capabilities, not an exhaustive list. | Tool use, agents, vision, coding workflows | Tools, structured output, reasoning controls |
How to choose
Start with the job you need to complete, then validate cost, access, and policy details on your exact provider route.
Fable requires 30-day retention for safety monitoring by default. Anthropic says enterprise data is not used for training without explicit permission; eligible enterprises can use EFS/customer-controlled storage or temporary zero-retention arrangements.
QwenCloud says it does not retain API inputs or outputs for training and processes them in memory; conversation storage can be disabled. OpenRouter and its underlying provider routes have separate settings and terms.
Provider and API links
Frequently asked questions
Claude Fable 5.1: Anthropic's frontier model for ambitious, long-running agentic and coding work, with strong vision and enterprise marketplace availability. Qwen3.8 Max: Alibaba's frontier Qwen model for long-context reasoning, coding, tools, and understanding text, images, and video.
Consider Claude Fable 5.1 when your priority is Long-running autonomous projects. Consider Qwen3.8 Max when your priority is Long coding and agent workflows. Test both with your own data and provider route before committing.
No. This comparison aligns provider-published facts for the Text & reasoning category. It does not claim a universal winner or combine incompatible third-party benchmark scores.
