← ModelRumors.ai buyer's guide
HEAD TO HEAD · UPDATED NOV 6, 2026
Claude Opus 5.5 vs Muse Wonder
Anthropic against Meta, on sourced numbers only. Green marks the higher (or cheaper) value on each row; the text below only calls a lead when the gap is bigger than measurement noise.
| Claude Opus 5.5 | Muse Wonder | |
|---|---|---|
| Arena Elo | 1509 source ↗ | 1507 source ↗ |
| GPQA Diamond | 90.6% source ↗ | not published |
| $ per 1M in / out | $4 / $20 source ↗ | $4 / $20 source ↗ |
| Blended $ per 1M (3:1) | $8.00 source ↗ | $8.00 source ↗ |
| Context window | 1M source ↗ | not published |
| Output speed | 110 tok/s source ↗ | not published |
| Released | Sep 22, 2026 source ↗ | Oct 12, 2026 source ↗ |
| Open weights | No source ↗ | No source ↗ |
| Reasoning effort tiers | low · medium · high · xhigh · max (default: medium) | minimal · low · medium · high · xhigh · max (default: not stated) |
| API effort control | output_config={"effort": "low" | "medium" | "high" | "xhigh" | "max"} source ↗ | reasoning_effort="minimal" | "low" | "medium" | "high" | "xhigh" | "max" (Chat Completions) source ↗ |
| Additional benchmarks | Arena WebDev: 1810 (#1) source ↗ SWE-bench Pro: 89.9% source ↗ Terminal-Bench 4.0: 66.4% (xhigh) source ↗ GDPval-AA v2.1: 1846 source ↗ CursorBench 4.0: 57.8% at max effort, 52.5% at default source ↗ AA Intelligence Index v5.0.1: 59 source ↗ | Arena Text: 1507 (#4, Max effort) source ↗ |
| Best for (workload) | Anthropic suggests starting with Opus 5.5 for most workloads. #1 on Arena WebDev (1810); 66.4% on Terminal-Bench 4.0 at xhigh effort (Anthropic). source ↗ | Meta's highest-ranked model on Arena Text (1507, #4 at Max effort). The API is in preview. source ↗ |
Arena Elo from the arena.ai text leaderboard as of Oct 27, 2026 source ↗. Speed measured by Artificial Analysis and varies by provider.
Which one should I use?
On the published numbers these two are close; pick on price notes, context window or the provider you already use. On release timing, Anthropic is at day 30 of a typical ~15-day gap (PAST TYPICAL GAP), and Meta is at day 22 of a typical ~14-day gap (PAST TYPICAL GAP).
Key differences from the sourced numbers
- They cost about the same: $8.00 vs $8.00 per 1M tokens at a 3:1 mix.
- On the Arena text leaderboard they are close (1509 vs 1507): a gap under 20 points is within the leaderboard's margin of error.
- Claude Opus 5.5 pricing note: Same rate across the full 1M context window.
- Muse Wonder pricing note: Meta Model API, in preview.
Frequently asked questions
Is Claude Opus 5.5 or Muse Wonder better?
They cost about the same: $8.00 vs $8.00 per 1M tokens at a 3:1 mix. On the Arena text leaderboard they are close (1509 vs 1507): a gap under 20 points is within the leaderboard's margin of error. Claude Opus 5.5 pricing note: Same rate across the full 1M context window. Muse Wonder pricing note: Meta Model API, in preview.
Which one should I use: Claude Opus 5.5 or Muse Wonder?
On the published numbers these two are close; pick on price notes, context window or the provider you already use. On release timing, Anthropic is at day 30 of a typical ~15-day gap (PAST TYPICAL GAP), and Meta is at day 22 of a typical ~14-day gap (PAST TYPICAL GAP).
How much does Claude Opus 5.5 cost compared with Muse Wonder?
Claude Opus 5.5 lists at $4 / $20 per 1M input/output tokens ($8.00/1M blended at 3:1). Muse Wonder lists at $4 / $20 per 1M input/output tokens ($8.00/1M blended at 3:1).
Facts checked Nov 5, 2026 against official sources. Every number links to its source. Spotted an error? Email [email protected].