Compare / head-to-head
DeepSeek V4.1 Flashvs
GPT-6 Luna
DeepSeek V4.1 Flash leads 1 of 1 shared benchmark. GPT-6 Luna is 2.5x 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
1 – 0
DeepSeek V4.1 Flash leads
Cheaper per token
GPT-6 Luna
2.5x cheaper, input + output
Larger context
GPT-6 Luna
1.1M tokens
Providers
2 providers
DeepSeek · OpenAI
DeepSeek V4.1 Flash
DeepSeek · released 2026-09-10
textvision
GPT-6 Luna
OpenAI · released 2026-09-22
textvision
Quality
Benchmark matrix
1 shared · 2 only DeepSeek V4.1 Flash · 0 only GPT-6 Luna| Benchmark | DeepSeek V4.1 Flash | GPT-6 Luna | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 1 | ||||
| DeepSWE v1.1 | 74.2% ↗ | 66.6% ↗ | +7.6 pt | DeepSeek V4.1 Flash |
| Only DeepSeek V4.1 Flash reports · 2 | ||||
| GPQA Diamond | 90.9% ↗ | not reported | — | — |
| Terminal-Bench 2.1 | 90.6% ↗ | not reported | — | — |
| Only GPT-6 Luna reports · 0 | ||||
| GPT-6 Luna reports nothing DeepSeek V4.1 Flash does not. | ||||
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 DeepSeek V4.1 Flash minus GPT-6 Luna 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 | DeepSeek V4.1 Flash | GPT-6 Luna | Edge |
|---|---|---|---|
| Context window | 1M tokens | 1.1M tokens | GPT-6 Luna |
| Max output | 384K tokens | 128K tokens | DeepSeek V4.1 Flash |
| Input price / 1M | $0.3 ↗ | $0.1 ↗ | GPT-6 Luna |
| Output price / 1M | $1.2 ↗ | $0.5 ↗ | GPT-6 Luna |
| Cached input / 1M | $0.006 ↗ | $0.01 ↗ | DeepSeek V4.1 Flash |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $1.5 | $0.6 | GPT-6 Luna |
| Modalities | text · vision | text · vision | Tie |
| Released | 2026-09-10 | 2026-09-22 | — |
| Cited benchmark scores | 3 | 1 | — |
Reliability
Provider status
Live from /statusMore matchups
DeepSeek V4.1 Flash vs …
Models sharing the most benchmarksMore matchups
GPT-6 Luna vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run DeepSeek V4.1 Flash and GPT-6 Luna on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.