Claude Fable 5 vs Muse Spark 1.1
Anthropic Claude Fable 5 | Meta Muse Spark 1.1 | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Meta |
| Release date | Jun 9 2026 | Jul 9 2026 |
| Access | Proprietary | Proprietary |
| Specifications | ||
Context window | 1M | — |
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | 56% | — |
Agentic coding SWE-Bench ProCan the AI fix real bugs in real software? It's handed actual problems from open-source projects and has to write code that genuinely solves them. Higher is better. | 80.3%Best | 61.5% |
Coding SWE-Bench VerifiedReal coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | 95.5% | — |
Agentic coding CursorBench v3.1Cursor's own test of harder, real-world coding tasks inside a code editor. Higher is better. | 72.9% | — |
Agentic coding DeepSWE 1.1Artificial Analysis' independent test of deep, agentic software-engineering work — the AI has to plan and carry out substantial coding tasks end to end. (Version 1.1 of the test.) Higher is better. | — | 53.3% |
Agentic coding DeepSWE 1.0Artificial Analysis' independent test of deep, agentic software-engineering work — the AI has to plan and carry out substantial coding tasks end to end. Higher is better. | 66.1% | — |
Next.js coding Next.js EvalsVercel's open eval of how well AI coding agents build and migrate real Next.js apps — measured as the share of tasks the agent completes successfully. Higher is better. | 92% | — |
Agentic terminal coding Terminal-Bench 2.1Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Higher is better. | 88%Best | 80% |
Multi-step tool use MCP AtlasCan the AI chain together many tools and steps to complete one bigger task, rather than doing just a single thing? Higher is better. | — | 88.1% |
Professional tool use JobBenchTests the AI on professional workplace tasks that require using real work tools — the kind of multi-step jobs an office worker handles. Higher is better. | — | 54.7% |
Personal tool use Toolathlon-VerifiedTests how well the AI uses everyday personal tools and apps to get things done — a human-checked version of Toolathlon. Higher is better. | — | 75.6% |
Multidisciplinary reasoning Humanity's Last Exam · with toolsHumanity'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. | — | 62.1% |
Agentic computer use OSWorld-VerifiedCan the AI actually operate a computer — clicking, typing, and using real apps — to finish tasks on its own? Higher is better. | 85%Best | 80.8% |
Agentic financial analysis Finance Agent v2Tests the AI on real financial-analysis work, like digging through reports and making sound decisions. Higher is better. | — | 57.2% |
Knowledge work GDPval-AAMeasures how well the AI does economically valuable knowledge work, judged against human experts. Shown as a rating (like a chess Elo) — higher is better. | 1932 | — |
Chart reasoning CharXiv ReasoningCan the AI read and reason about complex charts and figures, not just text? Higher is better. | — | 88.4% |
Visual reasoning BabyVisionTests core visual reasoning — seeing and understanding images the way even young children can, which AIs often find surprisingly hard. Higher is better. | — | 76.3% |
| Timeline | ||
| Release gap | Claude Fable 5 shipped 30 days before Muse Spark 1.1 | |
Which is better: Claude Fable 5 or Muse Spark 1.1?
Claude Fable 5 leads Muse Spark 1.1 on 3 of the 3 benchmarks they both report (SWE-Bench Pro, Terminal-Bench 2.1, OSWorld-Verified). Claude Fable 5 shipped 30 days before Muse Spark 1.1, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
On SWE-Bench Pro, Claude Fable 5 leads at 80.3% vs Muse Spark 1.1 at 61.5%. On Terminal-Bench 2.1, Claude Fable 5 leads at 88% vs Muse Spark 1.1 at 80%. On OSWorld-Verified, Claude Fable 5 leads at 85% vs Muse Spark 1.1 at 80.8%.
Frequently asked questions
Claude Fable 5 was released by Anthropic on Jun 9 2026.
Muse Spark 1.1 was released by Meta on Jul 9 2026.
Claude Fable 5 leads on SWE-Bench Pro — Claude Fable 5 80.3% vs Muse Spark 1.1 61.5%.
Other comparisons
Claude Fable 5 vs GPT-5.6 SolMuse Spark 1.1 vs GPT-5.6 SolClaude Fable 5 vs Gemini OmniMuse Spark 1.1 vs Gemini OmniClaude Fable 5 vs Grok 4.5Muse Spark 1.1 vs Grok 4.5Claude Fable 5 vs DeepSeek-V4-ProMuse Spark 1.1 vs DeepSeek-V4-ProClaude Fable 5 vs Mistral Medium 3.5Muse Spark 1.1 vs Mistral Medium 3.5Claude Fable 5 vs Kimi K2.7 CodeMuse Spark 1.1 vs Kimi K2.7 Code