Claude Fable 5.1 vs Stable Diffusion 3.5 Medium
At a Glance
| Compare | Claude Fable 5.1Anthropic |  Stable Diffusion 3.5 MediumStability AI |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| IntelligenceHigher is better · MM Intelligence v2.5 | #1 of 4699.0 score · 3/3 sources · complete | UnrankedNot in the 46-model eligible cohort |
| CostLower is better · Published-token output estimate | #43 of 44$0.824 per LiveBench case | UnrankedNot in the 44-model eligible cohort |
| EfficiencyHigher is better · MM Efficiency v1.5 | #22 of 3851.7 score · 3/3 sources · complete | UnrankedNot in the 38-model eligible cohort |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $10.00Anthropic ↗ · Sep 3, 2026 | Not reported |
| Output priceFrom · USD / 1M tokens | $50.00Anthropic ↗ · Sep 3, 2026 | Not reported |
| Context windowMaximum documented tokens | 1,000K | 0K |
| Model facts checked | Sep 2, 2026View model evidence → | Aug 28, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
Side-by-Side Facts
| Field | Claude Fable 5.1 | stable-diffusion-3.5-medium |
|---|---|---|
| Developer | Anthropic | Stability AI |
| Family | Claude 5 1 | Stable Diffusion 3 5 Medium |
| Model | Claude Fable 5.1 | stable-diffusion-3.5-medium |
| Version | Claude Fable 5.1 | stable-diffusion-3.5-medium |
| Lifecycle | active | active |
| Released | 2026-09-01 | 2024-10-29 |
| Knowledge cutoff | 2026-06-01 | Unknown |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Image |
| Context window | 1,000K | 0K |
| Total parameters | Unknown | 2.5B |
| Active parameters | Unknown | Unknown |
| License | Unknown | other |
| Open weights | No | Yes |
| API available | Yes | Yes |
| Self-hostable | No | Yes |
| Provider access | Anthropic (Standard) | Hugging Face (Standard), Stability AI (Pay as you go) |
| Capabilities | chat, generation, reasoning, tools | generation |
Claude Fable 5.1 Capabilities
Stable Diffusion 3.5 Medium Capabilities
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Primary Evidence
Sources and Freshness
Questions
Claude Fable 5.1 vs Stable Diffusion 3.5 Medium FAQs
Is Claude Fable 5.1 or Stable Diffusion 3.5 Medium better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Fable 5.1 and Stable Diffusion 3.5 Medium, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Fable 5.1 or Stable Diffusion 3.5 Medium?+
Only Claude Fable 5.1 has a directly sourced input price: $10.00 per million tokens. Only Claude Fable 5.1 has a directly sourced output price: $50.00 per million tokens.
Which has a larger context window, Claude Fable 5.1 or Stable Diffusion 3.5 Medium?+
Claude Fable 5.1 has the larger sourced context window. Claude Fable 5.1 supports 1,000K and Stable Diffusion 3.5 Medium supports 0K.
Which performs better in benchmarks, Claude Fable 5.1 or Stable Diffusion 3.5 Medium?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can Claude Fable 5.1 or Stable Diffusion 3.5 Medium be self-hosted?+
Stable Diffusion 3.5 Medium is the only model in this pair currently marked as self-hostable. Claude Fable 5.1 is not marked open weight; Stable Diffusion 3.5 Medium is open weight.
Can Claude Fable 5.1 and Stable Diffusion 3.5 Medium understand images?+
Claude Fable 5.1 is documented with image input; Stable Diffusion 3.5 Medium is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Fable 5.1 or Stable Diffusion 3.5 Medium?+
Neither has a larger sourced maximum output. Claude Fable 5.1 is 128K and Stable Diffusion 3.5 Medium is —.
Do Claude Fable 5.1 and Stable Diffusion 3.5 Medium support reasoning and tool use?+
Claude Fable 5.1: reasoning, tool calling, and image input. Stable Diffusion 3.5 Medium: none of these features are definitively sourced. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Fable 5.1 or Stable Diffusion 3.5 Medium?+
Claude Fable 5.1 has 1 sourced provider route; Stable Diffusion 3.5 Medium has 2, so Stable Diffusion 3.5 Medium has broader tracked availability.
Which offers better value, Claude Fable 5.1 or Stable Diffusion 3.5 Medium?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.