Claude Opus 4.8 vs Muse Spark 1.1
Anthropic Claude Opus 4.8 | Meta Muse Spark 1.1 | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Meta |
| Release date | May 28 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. | 95% | — |
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. | 69.2%Best | 61.5% |
Multilingual coding SWE-Bench MultilingualLike SWE-Bench, but the coding problems span many programming languages, not just one. Tests how broadly the AI can code. Higher is better. | 84.4% | — |
Agentic coding CursorBench v3.1Cursor's own test of harder, real-world coding tasks inside a code editor. Higher is better. | 63.8% | — |
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. | 55.8% | — |
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. | 79% | — |
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. | 74.6% | 80%Best |
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 · no toolsHumanity's Last Exam — extremely hard expert questions across many subjects, written so you can't just look up the answer. “No tools” means the AI answers on its own. Higher is better. | 49.8% | — |
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. | 57.9% | 62.1%Best |
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. | 83.4%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. | 53.9% | 57.2%Best |
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. | 1890 | — |
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 Opus 4.8 shipped 42 days before Muse Spark 1.1 | |
Which is better: Claude Opus 4.8 or Muse Spark 1.1?
Muse Spark 1.1 leads Claude Opus 4.8 on 3 of the 5 benchmarks they both report. Claude Opus 4.8 shipped 42 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 Opus 4.8 leads at 69.2% vs Muse Spark 1.1 at 61.5%. On Terminal-Bench 2.1, Muse Spark 1.1 leads at 80% vs Claude Opus 4.8 at 74.6%. On Humanity's Last Exam · with tools, Muse Spark 1.1 leads at 62.1% vs Claude Opus 4.8 at 57.9%. On OSWorld-Verified, Claude Opus 4.8 leads at 83.4% vs Muse Spark 1.1 at 80.8%. On Finance Agent v2, Muse Spark 1.1 leads at 57.2% vs Claude Opus 4.8 at 53.9%.
Frequently asked questions
Claude Opus 4.8 was released by Anthropic on May 28 2026.
Muse Spark 1.1 was released by Meta on Jul 9 2026.
Claude Opus 4.8 leads on SWE-Bench Pro — Claude Opus 4.8 69.2% vs Muse Spark 1.1 61.5%.
Muse Spark 1.1 leads on Humanity's Last Exam · with tools — Claude Opus 4.8 57.9% vs Muse Spark 1.1 62.1%.
Other comparisons
Claude Opus 4.8 vs GPT-5.6 SolMuse Spark 1.1 vs GPT-5.6 SolClaude Opus 4.8 vs Gemini OmniMuse Spark 1.1 vs Gemini OmniClaude Opus 4.8 vs Grok 4.5Muse Spark 1.1 vs Grok 4.5Claude Opus 4.8 vs DeepSeek-V4-ProMuse Spark 1.1 vs DeepSeek-V4-ProClaude Opus 4.8 vs Mistral Medium 3.5Muse Spark 1.1 vs Mistral Medium 3.5Claude Opus 4.8 vs Kimi K2.7 CodeMuse Spark 1.1 vs Kimi K2.7 Code