Model comparison
GPT-5.2 Pro vs Muse Spark 1.2
GPT-5.2 Pro is the stronger model overall, scoring 52.3 to 50.3 on the Noometry Index. Muse Spark 1.2 costs 29× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.
Last verified . 3 shared benchmarks.
MetaSummary
- They share 3 benchmarks with published results for both. GPT-5.2 Pro scores higher in 2 categories and Muse Spark 1.2 in 0 categories; one gap is clear of the uncertainty.
- The widest gap is in math, where GPT-5.2 Pro leads 65.3 to 46.4.
- The biggest single-benchmark swing is SimpleBench: 57.4% for GPT-5.2 Pro and 74.5% for Muse Spark 1.2.
- Muse Spark 1.2 is cheaper at $1.25 / $4.25 per million input/output tokens, against $21 / $168 for GPT-5.2 Pro.
- Muse Spark 1.2 accepts more context: 1.05M tokens versus 400K.
Side by side
| GPT-5.2 Pro | Muse Spark 1.2 | |
|---|---|---|
| Provider | OpenAI | Meta |
| Noometry Index | 52.3 | 50.3 |
| Released | 2025-12-11 | 2026-08-05 |
| Weights | Proprietary | Proprietary |
| Context window | 400K | 1.05M |
| Max output | 128K | 131K |
| Input $ / M tokens | $21 | $1.25 |
| Output $ / M tokens | $168 | $4.25 |
| Results tracked | 8 | 31 |
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Category by category
Coding Not comparable
GPT-5.2 Pro: —, Muse Spark 1.2: 49.2 (#51)
| Benchmark | GPT-5.2 Pro | Muse Spark 1.2 |
|---|---|---|
| DeepSWE | — | 54.9% |
| LMArena WebDev | — | 1533 |
| FrontierSWE | — | 12% |
| SciCode | — | 56.4% |
| WeirdML | — | 60.3% |
| LMArena Coding | — | 1495 |
Agentic & Tool Use Not comparable
GPT-5.2 Pro: —, Muse Spark 1.2: 29.4 (#87)
| Benchmark | GPT-5.2 Pro | Muse Spark 1.2 |
|---|---|---|
| APEX-Agents | — | 36.4% |
| GDP.pdf | — | 16% |
Reasoning Too close to call
GPT-5.2 Pro: 51.5 (#33), Muse Spark 1.2: 51.3 (#34)
| Benchmark | GPT-5.2 Pro | Muse Spark 1.2 |
|---|---|---|
| SimpleBench | 57.4% | 74.5% |
| NYT Connections (extended) | 79.3% | 79.2% |
| Epoch Capabilities Index | 155.4 | 154.87 |
| ARC-AGI-2 | 54.2% | — |
| ARC-AGI-1 | 90.5% | — |
| CritPt | — | 17.7% |
| LMArena Hard Prompts | — | 1486 |
| DTBench | — | 94.7% |
| LMCA | — | 48.4% |
Math GPT-5.2 Pro leads
GPT-5.2 Pro: 65.3 (#29), Muse Spark 1.2: 46.4 (#70)
| Benchmark | GPT-5.2 Pro | Muse Spark 1.2 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 74% | — |
| FrontierMath Tier 4 | 46% | — |
| ProofBench | — | 43% |
| LMArena Math | — | 1471 |
| FrontierMath Tier 4 (v1) | 31.3% | — |
Knowledge Not comparable
GPT-5.2 Pro: —, Muse Spark 1.2: 54.1 (#53)
| Benchmark | GPT-5.2 Pro | Muse Spark 1.2 |
|---|---|---|
| SimpleQA Verified | — | 60.3% |
| LMArena Expert | — | 1480 |
Multimodal Not comparable
GPT-5.2 Pro: —, Muse Spark 1.2: 43.4 (#25)
| Benchmark | GPT-5.2 Pro | Muse Spark 1.2 |
|---|---|---|
| LMArena Vision | — | 1305 |
Multilingual Not comparable
GPT-5.2 Pro: —, Muse Spark 1.2: 57.1 (#11)
| Benchmark | GPT-5.2 Pro | Muse Spark 1.2 |
|---|---|---|
| LMArena Non-English | — | 1478 |
| LMArena Chinese | — | 1511 |
| LMArena French | — | 1513 |
| LMArena Russian | — | 1487 |
| LMArena Spanish | — | 1498 |
Instruction Following Not comparable
GPT-5.2 Pro: —, Muse Spark 1.2: 76.7 (#36)
| Benchmark | GPT-5.2 Pro | Muse Spark 1.2 |
|---|---|---|
| LMArena Instruction Following | — | 1461 |
Long Context Not comparable
GPT-5.2 Pro: —, Muse Spark 1.2: 45.2 (#48)
| Benchmark | GPT-5.2 Pro | Muse Spark 1.2 |
|---|---|---|
| LMArena Longer Query | — | 1475 |
Writing & Preference Not comparable
GPT-5.2 Pro: —, Muse Spark 1.2: 72.3 (#14)
| Benchmark | GPT-5.2 Pro | Muse Spark 1.2 |
|---|---|---|
| LMArena Text | — | 1482 |
| LMArena Creative Writing | — | 1449 |
| EQ-Bench Creative Writing | — | 1840 |
| LMArena Multi-Turn | — | 1494 |
Frequently asked questions
Is GPT-5.2 Pro better than Muse Spark 1.2?
GPT-5.2 Pro is the stronger model overall, scoring 52.3 to 50.3 on the Noometry Index. Muse Spark 1.2 costs 29× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.
Which is cheaper, GPT-5.2 Pro or Muse Spark 1.2?
Muse Spark 1.2 is cheaper. It lists at $1.25 per million input tokens and $4.25 per million output tokens; GPT-5.2 Pro lists at $21 and $168.
Which has the bigger context window?
Muse Spark 1.2 does, with 1.05M tokens against 400K.
How many benchmarks do GPT-5.2 Pro and Muse Spark 1.2 share?
3 benchmarks have published results for both models. GPT-5.2 Pro has 8 scored results on Noometry and Muse Spark 1.2 has 31.