GLM-5.3-Flash vs Muse Spark 1.2
| Spec | GLM-5.3-Flash | Muse Spark 1.2 |
|---|---|---|
| Respan Index | 45.2 (#45) | 45.6 (#43) |
| Blended price per 1M | $0.043 | $2 |
| Context window | 1M | 1.0M |
| Input / output per 1M | $0.027 / $0.092 | $1.25 / $4.25 |
| Max output | 131K | - |
| Input | text, vision | text, vision, video, audio |
| Released | 2026-08-26 | 2026-08-05 |
Respan Index by category
Each category is scored 0 to 100, and how far ahead the winner is. Leads under a point are close to even.
| Category | GLM-5.3-Flash | Muse Spark 1.2 |
|---|---|---|
| Coding | 39.9 GLM-5.3-Flash | 22.0 Muse Spark 1.2 |
| Agents | 61.6 GLM-5.3-Flash | 58.1 Muse Spark 1.2 |
| Reasoning | 32.8 GLM-5.3-Flash | 46.4 Muse Spark 1.2 |
| Knowledge & language | 32.0 GLM-5.3-Flash | 58.3 Muse Spark 1.2 |
| Human preference | 56.1 GLM-5.3-Flash | 54.5 Muse Spark 1.2 |
Benchmarks both report
GLM-5.3-Flash leads on 10 of the 19 benchmarks both report. Higher is better. Each score links to where it was published.
| Benchmark | GLM-5.3-Flash | Muse Spark 1.2 |
|---|---|---|
| Chess Puzzles (Epoch AI) | 21% | 27% |
| LMArena Agent (LMArena) | -0.0233 | -0.0754 |
| LMArena Elo | 1477 | 1492 |
| LMArena WebDev (LMArena) | 1607 | 1534 |
| Terminal-Bench 4.0 (Vals AI) | 37.4% | 6.1% |
| LMArena Vision (LMArena) | 1271 | 1293 |
| APEX-Agents (Mercor) | 52.8% | 45.4% |
| DeepSWE v1.1 (Datacurve) | 63.4% | 54.9% |
| FrontierSWE V2 (Proximal Labs) | 18.1% | 12% |
| LiveBench Agentic Coding (LiveBench) | 56.8% | 57.6% |
| LiveBench Coding (LiveBench) | 79% | 77.5% |
| LiveBench Data Analysis (LiveBench) | 76.4% | 76.5% |
| LiveBench Instruction Following (LiveBench) | 52.8% | 74.3% |
| LiveBench Language (LiveBench) | 77.3% | 78.6% |
| LiveBench Mathematics (LiveBench) | 81.2% | 91.2% |
| LiveBench Reasoning (LiveBench) | 77.6% | 90% |
| DeepSWE v1.1 | 63.4% | 59.3% |
| Terminal-Bench 2.1 | 84.3% | 82.9% |
| Toolathlon-Verified (HKUST) | 78.4% | 75.9% |
FAQ
Is GLM-5.3-Flash better than Muse Spark 1.2?
Muse Spark 1.2 scores 45.6 on the Respan Index (#43), ahead of GLM-5.3-Flash at 45.2 (#45). GLM-5.3-Flash leads on 10 of the 19 benchmarks both report.
Which is cheaper, GLM-5.3-Flash or Muse Spark 1.2?
GLM-5.3-Flash lists at $0.027 input and $0.092 output per 1M tokens; Muse Spark 1.2 at $1.25 and $4.25. GLM-5.3-Flash is 46x cheaper per token at list price.
Which has the larger context window?
GLM-5.3-Flash accepts 1M tokens and Muse Spark 1.2 1.0M tokens.