Claude Fable 5.1 vs Grok Build 0.1
Model Markets Rankings
Intelligence, Cost, and Efficiency
| Ranking | Claude Fable 5.1 | Grok Build 0.1 |
|---|---|---|
| CostLower is better · Published-token output estimate | UnrankedNot in the 36-model eligible cohort | #1 of 36$0.0020 per LiveBench case |
Ranks come from the current complete eligible cohorts. Green highlights appear only when both models are ranked in the same metric. Missing required inputs remain unranked, and the three dimensions are not collapsed into an overall winner.
Benchmark Performance
Available Benchmarks
Technical Differences
Side-by-Side Facts
| Field | Claude Fable 5.1 | Grok Build 0.1 |
|---|---|---|
| Developer | Anthropic | xAI |
| Family | Claude 5 1 | Grok Build |
| Model | Claude Fable 5.1 | Grok Build 0.1 |
| Version | Claude Fable 5.1 | Grok Build 0.1 |
| Lifecycle | active | preview |
| Released | 2026-09-01 | 2026-05-29 |
| Knowledge cutoff | 2026-06-01 | Unknown |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,000K | 256K |
| Total parameters | Unknown | Unknown |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | No | No |
| API available | Yes | Yes |
| Self-hostable | No | No |
| Provider access | Anthropic (Standard) | Xai (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, generation, reasoning, structured_outputs, tools |
14 comparable fields · 9 material differences · Pair passes the primary-source comparison gate
Claude Fable 5.1 Capabilities
Grok Build 0.1 Capabilities
Internal Comparison Graph
Related Comparisons
| A | Pair | B | Context |
|---|---|---|---|
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Claude Fable 5.1Anthropic | vs |  GPT-6 AstraOpenAI | cross-developer peersimage, text |
Claude Fable 5.1Anthropic | vs |  Gemini 3.1 ProGoogle DeepMind | cross-developer peerstext |
Claude Fable 5.1Anthropic | vs |  DeepSeek-V4-ProDeepSeek | cross-developer peerstext |
Claude Fable 5.1Anthropic | vs | Grok 4.6xAI | cross-developer peersimage, text |
Claude Fable 5.1Anthropic | vs |  Qwen3.8-MaxQwen | cross-developer peersimage, text |
Claude Fable 5.1Anthropic | vs |  Kimi-K3Moonshot AI | cross-developer peersimage, text |
 MiniMax-M3MiniMax | vs | Claude Fable 5.1Anthropic | cross-developer peersimage, text |
Claude Fable 5.1Anthropic | vs |  GLM-5.3Z.ai | cross-developer peerstext |
Claude Fable 5.1Anthropic | vs |  Hy4 previewTencent | cross-developer peerstext |
Claude Fable 5.1Anthropic | vs | Seed 2.1 ProByteDance Seed | cross-developer peersimage, text |
Claude Fable 5.1Anthropic | vs |  Mistral Large 3Mistral AI | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
Claude Fable 5.1 vs Grok Build 0.1 FAQs
Is Claude Fable 5.1 or Grok Build 0.1 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Fable 5.1 and Grok Build 0.1, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Fable 5.1 or Grok Build 0.1?+
Claude Fable 5.1 is $10.00 and Grok Build 0.1 is $1.00 per million tokens, so Grok Build 0.1 is cheaper on this metric. Claude Fable 5.1 is $50.00 and Grok Build 0.1 is $2.00 per million tokens, so Grok Build 0.1 is cheaper on this metric.
Which has a larger context window, Claude Fable 5.1 or Grok Build 0.1?+
Claude Fable 5.1 has the larger sourced context window. Claude Fable 5.1 supports 1,000K and Grok Build 0.1 supports 256K.
Which performs better in benchmarks, Claude Fable 5.1 or Grok Build 0.1?+
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 Grok Build 0.1 be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Claude Fable 5.1 is not marked open weight; Grok Build 0.1 is not marked open weight.
Can Claude Fable 5.1 and Grok Build 0.1 understand images?+
Claude Fable 5.1 is documented with image input; Grok Build 0.1 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Fable 5.1 or Grok Build 0.1?+
Neither has a larger sourced maximum output. Claude Fable 5.1 is 128K and Grok Build 0.1 is —.
Do Claude Fable 5.1 and Grok Build 0.1 support reasoning and tool use?+
Claude Fable 5.1: reasoning, tool calling, and image input. Grok Build 0.1: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Fable 5.1 or Grok Build 0.1?+
Claude Fable 5.1 has 1 sourced provider route; Grok Build 0.1 has 1, a tie.
Which offers better value, Claude Fable 5.1 or Grok Build 0.1?+
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.