Compare / head-to-head
GPT-6 Lunavs
Muse Spark 1.3
Muse Spark 1.3 leads 1 of 1 shared benchmark. GPT-6 Luna is 9.2x cheaper per token. GPT-6 Luna has the larger context window (1.1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0 – 1
Muse Spark 1.3 leads
Cheaper per token
GPT-6 Luna
9.2x cheaper, input + output
Larger context
GPT-6 Luna
1.1M tokens
Providers
2 providers
OpenAI · Meta
GPT-6 Luna
OpenAI · released 2026-09-22
textvision
Muse Spark 1.3
Meta · released 2026-09-02
textvisionvideo
Quality
Benchmark matrix
1 shared · 0 only GPT-6 Luna · 9 only Muse Spark 1.3| Benchmark | GPT-6 Luna | Muse Spark 1.3 | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 1 | ||||
| DeepSWE v1.1 | 66.6% ↗ | 75.4% ↗ | -8.8 pt | Muse Spark 1.3 |
| Only GPT-6 Luna reports · 0 | ||||
| GPT-6 Luna reports nothing Muse Spark 1.3 does not. | ||||
| Only Muse Spark 1.3 reports · 9 | ||||
| AutomationBench | not reported | 49.6% ↗ | — | — |
| DeepSearchQA | not reported | 90.3% ↗ | — | — |
| GDPval-AA v2 | not reported | 1754 ↗ | — | — |
| JobBench | not reported | 64.9% ↗ | — | — |
| 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% ↗ | — | — |
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 GPT-6 Luna 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 | GPT-6 Luna | Muse Spark 1.3 | Edge |
|---|---|---|---|
| Context window | 1.1M tokens | 1.0M tokens | GPT-6 Luna |
| Max output | 128K tokens | — | — |
| Input price / 1M | $0.1 ↗ | $1.25 ↗ | GPT-6 Luna |
| Output price / 1M | $0.5 ↗ | $4.25 ↗ | GPT-6 Luna |
| Cached input / 1M | $0.01 ↗ | $0.15 ↗ | GPT-6 Luna |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $0.6 | $5.5 | GPT-6 Luna |
| Modalities | text · vision | text · vision · video | Muse Spark 1.3 |
| Released | 2026-09-22 | 2026-09-02 | — |
| Cited benchmark scores | 1 | 10 | — |
Reliability
Provider status
Live from /statusMore matchups
GPT-6 Luna vs …
Models sharing the most benchmarksMore matchups
Muse Spark 1.3 vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run GPT-6 Luna and Muse Spark 1.3 on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.