text model comparison
GPT-6 Luna vs MiMo-V2.6-Flash
GPT-6 Luna and MiMo-V2.6-Flash are both current text models, from OpenAI and Xiaomi MiMo. GPT-6 Luna is 29% cheaper per 1M input tokens than MiMo-V2.6-Flash, $0.10 vs $0.14. On Arena Text, GPT-6 Luna scores 1443 Elo and MiMo-V2.6-Flash 1451 Elo (Arena, measured October 8, 2026). GPT-6 Luna has the larger context window, 1,050,000 vs 1,000,000 tokens.
Data verified October 13, 2026 · Dataset 2026-10-13
Side by side
Standard-tier prices in effect today. The better value in each row is highlighted.
| Fact | GPT-6 Luna | MiMo-V2.6-Flash |
|---|---|---|
| Price per 1M input tokens | $0.10 (better) | $0.14 |
| Price per 1M output tokens | $0.50 | $0.28 (better) |
| Cost of 10M input and 2M output tokens | $2 | $1.96 (better) |
| Arena Text | 1443 Elo (#37 of 49) | 1451 Elo (#35 of 49) (better) |
| GPQA Diamond | 90.5% (#25 of 40) | Not measured |
| FrontierMath Tiers 1-3 (v2) | 78.9% (#14 of 40) | Not measured |
| SimpleQA Verified | 41.4% (#26 of 36) | Not measured |
| Provider | OpenAI | Xiaomi MiMo |
| Release date | September 22, 2026 | September 22, 2026 |
| Access | API only | API and open weights |
| Context window | 1,050,000 tokens | 1,000,000 tokens |
| Max output | 128,000 tokens | 128,000 tokens |
| Input | text, image | text, image, audio, video |
| Output | text | text |
When to choose each
GPT-6 Luna
Best for
- High-volume summarisation, extraction and routing
- Long-context budget work, where the 272k threshold is more forgiving than Haiku 5.5's 100k
Watch out for
- Prompts over 272,000 tokens are rebilled at $0.20 input and $0.75 output for the whole request
- A twentieth of GPT-6 Sol's price reflects a capability gap, not a discount on the same model
MiMo-V2.6-Flash
Best for
- High-frequency multimodal calls
- Low-cost agent workloads
Watch out for
- Xiaomi's own table puts it well behind the Pro model on exploitation tasks (ExploitBench 25.3 against 47.9)
- The API checkpoint (RL or MOPD weights) is not identified
GPT-6 Luna vs MiMo-V2.6-Flash FAQ
Which is cheaper, GPT-6 Luna or MiMo-V2.6-Flash?
GPT-6 Luna is 29% cheaper per 1M input tokens than MiMo-V2.6-Flash, $0.10 vs $0.14. For 10M input and 2M output tokens, GPT-6 Luna costs $2 and MiMo-V2.6-Flash $1.96 at standard rates.
Which scores higher on independent benchmarks, GPT-6 Luna or MiMo-V2.6-Flash?
MiMo-V2.6-Flash leads on Arena Text, 1451 Elo to 1443 Elo. Scores are independent evaluations, not either vendor's launch figures.
Which has the larger context window, GPT-6 Luna or MiMo-V2.6-Flash?
GPT-6 Luna has the larger context window, 1,050,000 vs 1,000,000 tokens.
Can I run GPT-6 Luna or MiMo-V2.6-Flash myself?
MiMo-V2.6-Flash is released as open weights you can run yourself; GPT-6 Luna is available through its provider's API only.
Related comparisons
Production evaluation
Choosing between GPT-6 Luna and MiMo-V2.6-Flash?
Public benchmarks narrow the shortlist. We run both on your own tasks, data and cost limits, then build the routing and review controls to run the winner in production.
- A head-to-head evaluation on your real workload
- Routing between models by cost and difficulty