Muse Wonder vs Claude Opus 5.5
Last verified: October 28, 2026 · Sources: Artificial Analysis (Intelligence Index v4.3), vendor announcements
Quick verdict
Opus 5.5 is still the stronger all-round model — Intelligence Index 58 vs Wonder Full's 56 and Wonder's 52, plus a clear lead on factual knowledge (AA-Omniscience 46 vs 30). But the gap is small and the prices are identical ($4/$20 per 1M tokens), so Muse Wonder wins on its agent features: cross-session Active Memory and Active Focus self-correction. If you run long-lived coding or workflow agents, Wonder Full + Muse Code (coding-agent index 68) is the more interesting package; if you need maximum reasoning and knowledge depth, stay on Opus 5.5.
Side-by-side comparison
| Muse Wonder | Muse Wonder Full | Claude Opus 5.5 | |
|---|---|---|---|
| Vendor | Meta | Meta | Anthropic |
| API input / output (per 1M) | $4 / $20 | Not on API | ≈ $4 / $20 (matches) |
| Cached input | $0.20 | — | Discounted |
| Context window | ~1M tokens (1,048,576) | Not publicly confirmed | |
| AA Intelligence Index v4.3 | 52 | 56 | 58 (leads) |
| Coding-agent index | — | 68 (with Muse Code) | — (see note) |
| Factual knowledge (AA-Omniscience) | 30 | 46 (+16) | |
| Signature strengths | Active Memory, Active Focus, multimodal input (text/image/video/audio/PDF) | Code quality, refactoring, security review, "super agent" backbone | |
| Avg cost per task | $4.52 | — | |
| Subscription | Muse app $20 / $100 mo | Muse Code $50 / $200 mo | Claude plans |
Note: the coding-agent index compares tool-augmented setups (Muse Wonder Full scored 68 with Muse Code, tied with Claude Sonnet 5.5 + Claude Code). Direct Opus 5.5 + Claude Code numbers were not in the October 2026 data set — verify on Artificial Analysis before quoting.
Pricing: a dead heat
Muse Wonder launched at $4 input / $20 output per 1M tokens with cached input at $0.20 — deliberately matching Opus 5.5 and undercutting GPT-6 Astra ($10/$50). Since the per-token prices are the same, your decision rides on capability and features, not cost. The one real cost difference: Muse Wonder Full is not available via API at all — it is gated behind Muse Code subscriptions ($50 or $200/month), while everything Opus offers is API-accessible.
Benchmarks: close on index, far on knowledge
On the Artificial Analysis Intelligence Index v4.3, Opus 5.5 scores 58, Wonder Full 56 (tying Claude Sonnet 5.5) and Wonder 52. A 2-point gap is within "genuinely frontier-tier contender" territory. The lopsided number is factual knowledge: AA-Omniscience 46 (Opus) vs 30 (Wonder) — for research-heavy, fact-dependent work, that is the deciding stat. Independent hands-on reviewers also reported a benchmark-vs-reality gap on Wonder, with some ranking Kimi K3 ahead in practical use.
Coding and agents: where Wonder fights back
Paired with the Muse Code tooling, Wonder Full hits 68 on the coding-agent index — tied with Sonnet 5.5 + Claude Code. Meta's two agent features matter most in day-to-day agentic work:
- Active Memory — carries context, preferences and decisions across sessions, not just within one conversation. For assistants that should "remember you", this is the headline differentiator.
- Active Focus — when blocked, the model tries alternative paths and asks for confirmation before important actions, instead of the classic agent failure of erroring out mid-task.
Opus 5.5's reputation, by contrast, is the ceiling for code quality, refactoring and security review, and it has become the default backbone of third-party "super agent" platforms.
Which should you choose?
| Your situation | Verdict |
|---|---|
| Deep research, factual accuracy, analysis | Opus 5.5 — the +16 Omniscience gap is decisive |
| Highest code quality / security review | Opus 5.5 |
| Long-lived agents that must remember you | Muse Wonder — Active Memory is unique |
| Coding agents on a fixed subscription | Wonder Full via Muse Code ($50/mo) |
| Video/audio/PDF-heavy input in one context | Muse Wonder — multimodal input + ~1M context |
| Region-restricted (China incl. HK/Macau, Russia) | Opus 5.5 — Wonder is not offered there |
Related comparisons
- Muse Wonder vs Gemini 4 (Argon) — the half-price alternative to both
- Muse Wonder vs GPT-6 (Astra) — the $10/$50 premium option
- Muse Wonder vs Spark 1.3 — upgrading within Meta
- Muse Wonder API pricing in full — every tier and the cost-per-task math
Data verified October 28, 2026 against Artificial Analysis (Intelligence Index v4.3, coding-agent index, cost-per-task averages) and vendor announcements. This is an unofficial comparison page; see about.