Meta's Muse Wonder Full (Max) Rises to #4 in Agent Arena

Arena.ai (@arena) · 2026-10-20 20

Exciting news: Muse Wonder Full (Max) has moved up @AIatMeta as the #4 lab in the Agent Arena!

The latest model ranks #7 in Agent Arena with +11.3% net improvement across +6.5K real-world agentic sessions.

This is a clear step forward for the Muse family:

+7.5 percentage points over Muse Wonder (Max), ranked #14 at +3.8% +7.8 percentage points over Muse Spark 1.3 (Max), ranked #17 at +3.5%

This performance shows up across categories too: #5 in Chat, #6 in Code, and #7 in Work.

At the signal level, Muse Wonder Full (Max) ranks:

• #6 in Praise vs. Complaint (+21.9%)
• #6 in Confirmed Success (+13.4%)
• #7 in Steerability (+11.2%)
• #16 in Bash Reliability (+7.7%)
• No issues in Tool Hallucination

Congrats to the @AIatMeta team and @alexandr_wang!

↳ 引用 @arena (Arena.ai): Exciting news: Muse Wonder Full (Max) by @AIatMeta has just debuted in the Code Arena: WebDev at #6 overall with 1726 pts, putting Meta in the top 3 labs!

This is +75 pts and 11 places above Muse Wonder (Max) at #17 (1651 pts), and +67 pts and 8 places above Muse Spark 1.3 (Max) at #14 (1659 pts).

Muse Wonder Full (#6) also landed +16 pts above Claude Sonnet 5.5 (#17), and +48 pts above Gemini 4 Argon (#10). With this score, Muse took the #3 lab spot (previously held by Google).

Across categories, Muse Wonder Full (Max) landed:

• #4 in Data & Analytics and in Consumer Product
• #5 in Brand & Marketing
• #6 in Content Creation Tools
• #7 in Gaming and in Simulations
• #8 in Reference-Based Design

Congrats to the @AIatMeta team and @alexandr_wang on this release!