Muse Spark Open vs Claude Mythos Preview
Rank, tier, score and price side by side, from our weekly rankings. Scores are editorial opinion based on public sources.
A
Muse Spark Open
B
Claude Mythos Preview
- ProviderMetaAnthropic
- Rank#36#33Higher rank
- TierAA
- Score82.382.4Higher score
- PriceOpen weights (Muse Model License); hosted APIs around $1.25 input / $4.25 output per 1M tokensLower price tierInvite-only via Project Glasswing; $25 input / $125 output per 1M tokens after credits
- TaglineMeta's 816B-parameter open-weight mixture-of-experts reasoning model (October 2026) aimed at coding agents and tool use.Anthropic's invite-only cybersecurity research preview offered through Project Glasswing, deprecated on the Claude API since June 2026.
| Attribute | Muse Spark Open | Claude Mythos Preview |
|---|---|---|
| Provider | Meta | Anthropic |
| Rank | #36 | #33Higher rank |
| Tier | A | A |
| Score | 82.3 | 82.4Higher score |
| Price | Open weights (Muse Model License); hosted APIs around $1.25 input / $4.25 output per 1M tokensLower price tier | Invite-only via Project Glasswing; $25 input / $125 output per 1M tokens after credits |
| Tagline | Meta's 816B-parameter open-weight mixture-of-experts reasoning model (October 2026) aimed at coding agents and tool use. | Anthropic's invite-only cybersecurity research preview offered through Project Glasswing, deprecated on the Claude API since June 2026. |