Compare / head-to-head
Claude Opus 4.5vs
Muse Spark 1.3
Muse Spark 1.3 leads 15 of 15 shared benchmarks. Muse Spark 1.3 is 5.5x cheaper per token. Muse Spark 1.3 has the larger context window (1.0M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0 – 15
Muse Spark 1.3 leads
Cheaper per token
Muse Spark 1.3
5.5x cheaper, input + output
Larger context
Muse Spark 1.3
1.0M tokens
Providers
2 providers
Anthropic · Meta
Claude Opus 4.5
Anthropic · released 2025-11-24
textvision
Muse Spark 1.3
Meta · released 2026-09-02
textvisionvideo
Quality
Benchmark matrix
15 shared · 23 only Claude Opus 4.5 · 14 only Muse Spark 1.3| Benchmark | Claude Opus 4.5 | Muse Spark 1.3 | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 15 | ||||
| LMArena Elo | 1473.6 ↗ | 1494.3 ↗ | -20.7 | Muse Spark 1.3 |
| Chess Puzzles (Epoch AI run) | 12% ↗epoch run | 38% ↗epoch run | -26 pt | Muse Spark 1.3 |
| FrontierMath Tier 4 v2 (Epoch AI run) | 4.9% ↗epoch run | 46.3% ↗epoch run | -41.4 pt | Muse Spark 1.3 |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 34.4% ↗epoch run | 74.4% ↗epoch run | -40 pt | Muse Spark 1.3 |
| LiveBench Agentic Coding (LiveBench) | 39.7% ↗ | 64.1% ↗ | -24.4 pt | Muse Spark 1.3 |
| LiveBench Coding (LiveBench) | 79.7% ↗ | 81.1% ↗ | -1.4 pt | Muse Spark 1.3 |
| LiveBench Data Analysis (LiveBench) | 74.4% ↗ | 79.6% ↗ | -5.2 pt | Muse Spark 1.3 |
| LiveBench Instruction Following (LiveBench) | 62.5% ↗ | 78% ↗ | -15.5 pt | Muse Spark 1.3 |
| LiveBench Language (LiveBench) | 81.3% ↗ | 82.8% ↗ | -1.5 pt | Muse Spark 1.3 |
| LiveBench Mathematics (LiveBench) | 90.4% ↗ | 95.9% ↗ | -5.5 pt | Muse Spark 1.3 |
| LiveBench Reasoning (LiveBench) | 80.1% ↗ | 89.7% ↗ | -9.6 pt | Muse Spark 1.3 |
| LMArena WebDev (LMArena) | 1493.3 ↗ | 1656.6 ↗ | -163.3 | Muse Spark 1.3 |
| Mystery Game Puzzles (Epoch AI run) | 22% ↗epoch run | 25% ↗epoch run | -3 pt | Muse Spark 1.3 |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 86.1% ↗epoch run | 99.2% ↗epoch run | -13.1 pt | Muse Spark 1.3 |
| SimpleBench (SimpleBench) | 62% ↗ | 81.8% ↗ | -19.8 pt | Muse Spark 1.3 |
| Only Claude Opus 4.5 reports · 23 | ||||
| SWE-bench Verified | 80.9% ↗ | not reported | — | — |
| GPQA Diamond | 87% ↗ | not reported | — | — |
| ARC-AGI-2 (Verified) | 37.6% ↗ | not reported | — | — |
| BALROG (BALROG) | 43.5% ↗ | not reported | — | — |
| EBR-bench (Epoch AI run) | 14.3% ↗epoch run | not reported | — | — |
| Furniture Assembly (Epoch AI run) | 28.3% ↗epoch run | not reported | — | — |
| GSO Opt@1 (GSO) | 24.5% ↗ | not reported | — | — |
| MCP Atlas | 62.3% ↗ | not reported | — | — |
| MMMLU | 90.8% ↗ | not reported | — | — |
| MMMU (validation) | 80.7% ↗ | not reported | — | — |
| OSWorld | 66.3% ↗ | not reported | — | — |
| SAGE (Vals AI) | 52.1% ↗ | not reported | — | — |
| SimpleQA Verified | 45.7% ↗epoch run | not reported | — | — |
| SWE-bench Verified (Epoch AI run) | 76.7% ↗epoch run | not reported | — | — |
| tau2-bench Airline (Sierra) | 84% ↗ | not reported | — | — |
| tau2-bench Banking Knowledge (Sierra) | 24.7% ↗ | not reported | — | — |
| tau2-bench Retail (Sierra) | 79.6% ↗ | not reported | — | — |
| tau2-bench Telecom (Sierra) | 92.3% ↗ | not reported | — | — |
| Terminal-Bench 2.0 | 59.3% ↗ | not reported | — | — |
| Vending-Bench 2 (Andon Labs) | 4967.06 ↗ | not reported | — | — |
| WeirdML (Håvard Tveit Ihle) | 63.7% ↗ | not reported | — | — |
| τ2-bench (Retail) | 88.9% ↗ | not reported | — | — |
| τ2-bench (Telecom) | 98.2% ↗ | not reported | — | — |
| Only Muse Spark 1.3 reports · 14 | ||||
| APEX-Agents (Mercor) | not reported | 57.8% ↗ | — | — |
| AutomationBench | not reported | 49.6% ↗ | — | — |
| DeepSearchQA | not reported | 90.3% ↗ | — | — |
| DeepSWE v1.1 | not reported | 75.4% ↗ | — | — |
| GDPval-AA v2 | not reported | 1754 ↗ | — | — |
| JobBench | not reported | 64.9% ↗ | — | — |
| LMArena Agent (LMArena) | not reported | 0.04 ↗ | — | — |
| LMArena Vision (LMArena) | not reported | 1290.2 ↗ | — | — |
| MRCR 256K-512K | not reported | 98.5% ↗ | — | — |
| MRCR 512K-1M | not reported | 98.1% ↗ | — | — |
| OSWorld 2.0 (partial) | not reported | 66.9% ↗ | — | — |
| SWE-Atlas Codebase QnA | not reported | 59.4% ↗ | — | — |
| Terminal-Bench 2.1 | not reported | 88.8% ↗ | — | — |
| Terminal-Bench 4.0 (Vals AI) | not reported | 24.7% ↗ | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is Claude Opus 4.5 minus Muse Spark 1.3 in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | Claude Opus 4.5 | Muse Spark 1.3 | Edge |
|---|---|---|---|
| Context window | 200K tokens | 1.0M tokens | Muse Spark 1.3 |
| Max output | 64K tokens | — | — |
| Input price / 1M | $5 ↗ | $1.25 ↗ | Muse Spark 1.3 |
| Output price / 1M | $25 ↗ | $4.25 ↗ | Muse Spark 1.3 |
| Cached input / 1M | $0.5 ↗ | $0.15 ↗ | Muse Spark 1.3 |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $30 | $5.5 | Muse Spark 1.3 |
| Modalities | text · vision | text · vision · video | Muse Spark 1.3 |
| Released | 2025-11-24 | 2026-09-02 | — |
| Cited benchmark scores | 39 | 29 | — |
Reliability
Provider status
Live from /statusMore matchups
Claude Opus 4.5 vs …
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Which one wins on your data?
Public benchmarks are a starting point. Run Claude Opus 4.5 and Muse Spark 1.3 on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.