Claude Mythos 5vsMuse Spark 1.2
Claude Mythos 5 | Muse Spark 1.2 | |
|---|---|---|
| Specifications | ||
Context windowHow much text the model can hold in mind at once — your question, any documents you attach, the conversation so far, and its own reply. Go past it and the earliest part falls out of view. | 1M | 1M |
| API pricingUSD per 1M tokens · lower wins | ||
Cheapest inputLowest input rate across third-party providers, excluding the lab itself. The cheapest endpoint may run a quantised build or a shorter context — see "Available from" on the model page. | — | $1.25Meta |
Cheapest outputLowest output rate across third-party providers, excluding the lab itself. May come from a different provider than the cheapest input. | — | $4.25Meta |
| Benchmarks | ||
Terminal-Bench 2.1Agentic terminal coding — Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Higher is better. | 88% | 82.9% |
| BenchmarksPublished by one model only | ||
SWE-Bench VerifiedCoding — Real 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% | — |
DeepSWE 1.1Agentic coding — Artificial 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. | — | 59.3% |
BrowseCompWeb browsing — Can the AI browse the web and track down hard-to-find answers? Higher is better. | 88% | — |
Humanity's Last Exam · with toolsMultidisciplinary reasoning — Humanity'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. | 64.5% | — |
OSWorld-VerifiedAgentic computer use — Can the AI actually operate a computer — clicking, typing, and using real apps — to finish tasks on its own? Higher is better. | 85% | — |
Arena Elo (Text)Community preference — Real people chat with two anonymous AIs side by side and vote for the answer they prefer. Votes become a chess-style Elo rating on arena.ai — it measures which AI people actually like, not test scores. Higher is better. | — | 1498 |
Arena Elo (Code)Community preference (code) — Like the text arena, but people vote on which AI writes better code. The votes become a chess-style Elo rating on arena.ai. Higher is better. | — | 1535 |
| Overview | ||
| Company | Anthropic | Meta |
| Release date | Jun 9 2026 | Aug 5 2026 |
| Access | Proprietary | Proprietary |
Other comparisons
Claude Mythos 5vsGPT-5.6 SolMuse Spark 1.2vsGPT-5.6 SolClaude Mythos 5vsGemini 3.7 FlashMuse Spark 1.2vsGemini 3.7 FlashClaude Mythos 5vsGrok 4.6Muse Spark 1.2vsGrok 4.6Claude Mythos 5vsDeepSeek-V4-Pro-0813Muse Spark 1.2vsDeepSeek-V4-Pro-0813Claude Mythos 5vsMistral Medium 3.5Muse Spark 1.2vsMistral Medium 3.5Claude Mythos 5vsKimi K3Muse Spark 1.2vsKimi K3
Frequently asked questions
Claude Mythos 5 leads Muse Spark 1.2 on 1 of the 1 benchmark they both report (Terminal-Bench 2.1). Claude Mythos 5 shipped 57 days before Muse Spark 1.2, so benchmark comparisons should account for the intervening progress.
Context windows are 1M (Claude Mythos 5) vs 1M (Muse Spark 1.2).
On Terminal-Bench 2.1, Claude Mythos 5 leads at 88% vs Muse Spark 1.2 at 82.9%.
Claude Mythos 5 was released by Anthropic on Jun 9 2026.
Muse Spark 1.2 was released by Meta on Aug 5 2026.
Claude Mythos 5 leads on Terminal-Bench 2.1 — Claude Mythos 5 88% vs Muse Spark 1.2 82.9%.
Claude Mythos 5 has a 1M context window; Muse Spark 1.2 has 1M.