text model comparison
GPT-6 Luna vs MiniMax M3.1 Flash
GPT-6 Luna and MiniMax M3.1 Flash are both current text models, from OpenAI and MiniMax. GPT-6 Luna is 33% cheaper per 1M input tokens than MiniMax M3.1 Flash, $0.10 vs $0.15. On Arena WebDev, GPT-6 Luna scores 1579 Elo and MiniMax M3.1 Flash 1582 Elo (Arena, measured October 28, 2026). GPT-6 Luna has the larger context window, 1,050,000 vs 1,000,000 tokens.
- Higher Arena WebDev
- MiniMax M3.1 Flash1582 Elo against 1579 Elo
- Lower price per 1M input tokens
- GPT-6 Luna$0.10 against $0.15
- Longer context window
- GPT-6 Luna1.05M tokens against 1M tokens
- Newer release
- MiniMax M3.1 FlashOct 2026 against Sep 2026
Data verified November 3, 2026 · Dataset 2026-11-03
Side by side
GPT-6 Luna and MiniMax M3.1 Flash, line by line
Prices in effect today, compared at the same tier wherever both list one. The better value in each row is highlighted.
| Fact | GPT-6 Luna | MiniMax M3.1 Flash |
|---|---|---|
| Price | ||
| Price per 1M input tokens | $0.10 (better) | $0.15 |
| Price per 1M output tokens | $0.50 (better) | $0.60 |
| Independent benchmarks | ||
| Arena WebDev | 1579 Elo (#28 of 45) | 1582 Elo (#26 of 45) (better) |
| Arena Text | 1441 Elo (#37 of 51) | Not measured |
| FrontierMath Tiers 1-3 (v2) | 78.9% (#17 of 42) | Not measured |
| GPQA Diamond | 90.5% (#26 of 41) | Not measured |
| SimpleQA Verified | 41.4% (#28 of 38) | Not measured |
| Specs | ||
| Provider | OpenAI | MiniMax |
| Release date | September 22, 2026 | October 19, 2026 |
| Access | API only | API and open weights |
| Context window | 1,050,000 tokens | 1,000,000 tokens |
| Max output | 128,000 tokens | Not reported |
| Input | text, image | text, image, video |
| Output | text | text |
Charts
Against every current text model
Where GPT-6 Luna and MiniMax M3.1 Flash land among the current models of their task, on every independent benchmark, on price and on context.
Where each stands
On Arena WebDev, GPT-6 Luna ranks #28 and MiniMax M3.1 Flash #26 of 45 current models. Each bar is the share of current models it beats: on score, price and context.
Independent benchmarks
Arena Text
GPT-6 Luna:#37of 51
1,441 Elo · ahead of 26%
MiniMax M3.1 Flash: Not scored
Arena WebDev
GPT-6 Luna:#28of 45
1,579 Elo · ahead of 39%
MiniMax M3.1 Flash:#26of 45
1,582 Elo · ahead of 41%
FrontierMath Tiers 1-3 (v2)
GPT-6 Luna:#17of 42
78.9% · ahead of 61%
MiniMax M3.1 Flash: Not scored
GPQA Diamond
GPT-6 Luna:#26of 41
90.5% · ahead of 35%
MiniMax M3.1 Flash: Not scored
SimpleQA Verified
GPT-6 Luna:#28of 38
41.4% · ahead of 27%
MiniMax M3.1 Flash: Not scored
Price and context
Price per 1M input tokens
GPT-6 Luna:#1of 52
$0.10 · cheaper than 96%
MiniMax M3.1 Flash:#5of 52
$0.15 · cheaper than 90%
Price per 1M output tokens
GPT-6 Luna:#3of 52
$0.50 · cheaper than 92%
MiniMax M3.1 Flash:#6of 52
$0.60 · cheaper than 90%
Context window
GPT-6 Luna:#1of 64
1.05M tokens · longer than 86%
MiniMax M3.1 Flash:#26of 64
1M tokens · longer than 22%
Quality against price
GPT-6 Luna scores 1,441 at $0.2 (blended price per 1M tokens). The line joins the current models no other beats on both price and Arena Text score; hover any point to name it.
Quality against price: the data
| Model | Provider | Blended price per 1M tokens | Arena Text (Elo) |
|---|---|---|---|
| Gemini 4 Argon | $4 | 1,520 | |
| Claude Opus 5.5 | Anthropic | $8 | 1,509 |
| Muse Wonder | Meta | $8 | 1,507 |
| Claude Fable 5 | Anthropic | $20 | 1,504 |
| Claude Fable 5.1 | Anthropic | $20 | 1,504 |
| Gemini 3.8 Flash | $1.50 | 1,496 | |
| Muse Spark 1.3 | Meta | $2 | 1,495 |
| Claude Opus 5 | Anthropic | $10 | 1,492 |
| Kimi K3 | Moonshot Kimi | $6 | 1,488 |
| GPT-5.6 Sol | OpenAI | $8 | 1,485 |
| Gemini 3.6 Flash | $3 | 1,483 | |
| GPT-5.5 | OpenAI | $11 | 1,482 |
| Claude Opus 4.8 | Anthropic | $10 | 1,482 |
| Qwen3.8-Max | Alibaba Qwen | $3 | 1,482 |
| GPT-6.1 Sol | OpenAI | $4 | 1,481 |
| GLM-5.3 | Z.ai | $2.15 | 1,481 |
| MiMo-V2.6-Pro | Xiaomi MiMo | $0.54 | 1,480 |
| Claude Sonnet 5.5 | Anthropic | $4 | 1,477 |
| GLM-5.3-Flash | Z.ai | $0.24 | 1,477 |
| GPT-6 Astra | OpenAI | $20 | 1,476 |
| DeepSeek-V4.1-Flash | DeepSeek | $0.52 | 1,476 |
| GPT-5.4 | OpenAI | $5.63 | 1,475 |
| Gemini 3 Flash Preview | $1.13 | 1,473 | |
| Grok 4.20 | xAI | $1.56 | 1,472 |
| GPT-5.6 Terra | OpenAI | $4.50 | 1,467 |
| Grok 4.5 | xAI | $3 | 1,465 |
| DeepSeek-V4-Pro | DeepSeek | $1.98 | 1,465 |
| Claude Sonnet 5 | Anthropic | $4 | 1,462 |
| GPT-6 Sol | OpenAI | $4 | 1,458 |
| Gemini 3.5 Flash-Lite | $0.85 | 1,456 | |
| Grok 4.6 | xAI | $3 | 1,455 |
| GPT-5.6 Luna | OpenAI | $0.45 | 1,453 |
| MiMo-V2.6-Flash | Xiaomi MiMo | $0.18 | 1,448 |
| Step 5 Preview | StepFun | $1.43 | 1,448 |
| Grok 4.3 | xAI | $1.56 | 1,442 |
| GPT-6 Luna | OpenAI | $0.20 | 1,441 |
| Grok 4.7 | xAI | $3 | 1,441 |
| Mistral Large 4 | Mistral AI | $1.05 | 1,432 |
| Claude Haiku 5.5 | Anthropic | $0.20 | 1,425 |
| GPT-4.1 | OpenAI | $3.50 | 1,415 |
| Solar Pro 4 | Upstage | $0.52 | 1,388 |
| GPT-4.1 mini | OpenAI | $0.70 | 1,383 |
| GPT-4.1 nano | OpenAI | $0.18 | 1,322 |
Cost
What each costs
Example workloads at each provider's listed rates, then every other rate either one lists. The cheaper figure in each row is highlighted.
The same work, priced
For 10M input and 2M output tokens, MiniMax M3.1 Flash costs 1.4 times as much as GPT-6 Luna, at each provider's listed rates.
10M input and 2M output tokens
MiniMax M3.1 Flash costs 1.4× as much
- GPT-6 Luna
- $2
- MiniMax M3.1 Flash
- $2.70
The same, with 9M of the input tokens cached
MiniMax M3.1 Flash costs 1.3× as much
- GPT-6 Luna
- $1.19
- MiniMax M3.1 Flash
- $1.49
| Workload or rate | GPT-6 Luna | MiniMax M3.1 Flash |
|---|---|---|
| Example workloads | ||
| 10M input and 2M output tokens | $2 (better) | $2.70 |
| The same, with 9M of the input tokens cached | $1.19 (better) | $1.49 |
| Other listed rates | ||
| 1M input tokens, cached | $0.01 (better) | $0.015 |
| 1M input tokens, prompts over 272K tokens | $0.20 | Not listed |
| 1M output tokens, prompts over 272K tokens | $0.75 | Not listed |
Your own bill will differ. These figures use list prices and example workloads. The AI Model Cost Audit reviews your real usage, shortlists models that score as well for each task for less, and estimates the savings.
Launch price $100, regular price $150
Verdict
When to choose each
GPT-6 Luna
Where it leads
- Lower input and output prices, $0.10 and $0.50 vs $0.15 and $0.60 per 1M tokens
- Larger context window 1,050,000 vs 1,000,000 tokens
- Cheaper cached input, $0.01 vs $0.015 per 1M tokens
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
MiniMax M3.1 Flash
Where it leads
- Higher Arena WebDev score, 1582 Elo vs 1579 Elo
- Accepts video input
- Open weights you can run yourself
Best for
- Low-cost coding and agent loops
- Long-context multimodal work on a budget
Watch out for
- Thinking cannot be turned off; effort runs from low to max, and max is the default
- MiniMax gives two parameter counts (about 428B in the model card, 220B in the file metadata)
From benchmark to production
Building on GPT-6 Luna or MiniMax M3.1 Flash?
Public scores rarely hold on your own data. We test both models on your real tasks, then build the agent or pipeline around the one that wins.
AI Model Cost AuditLaunch price $100, regular price $150What the audit includes
FAQ
GPT-6 Luna vs MiniMax M3.1 Flash FAQ
Which is cheaper, GPT-6 Luna or MiniMax M3.1 Flash?
GPT-6 Luna is 33% cheaper per 1M input tokens than MiniMax M3.1 Flash, $0.10 vs $0.15. For 10M input and 2M output tokens, GPT-6 Luna costs $2 and MiniMax M3.1 Flash $2.70 at standard rates.
Which is cheaper with prompt caching, GPT-6 Luna or MiniMax M3.1 Flash?
GPT-6 Luna charges $0.01 per 1M cached input tokens, 90% below its standard input rate, and MiniMax M3.1 Flash $0.015, 90% below. With 9M of 10M input tokens cached and 2M output tokens, GPT-6 Luna costs $1.19 and MiniMax M3.1 Flash $1.49.
Which scores higher on independent benchmarks, GPT-6 Luna or MiniMax M3.1 Flash?
MiniMax M3.1 Flash leads on Arena WebDev, 1582 Elo to 1579 Elo. Scores are independent evaluations, not either vendor's launch figures.
Which has the larger context window, GPT-6 Luna or MiniMax M3.1 Flash?
GPT-6 Luna has the larger context window, 1,050,000 vs 1,000,000 tokens.
How do GPT-6 Luna and MiniMax M3.1 Flash differ in features?
GPT-6 Luna takes text and image input; MiniMax M3.1 Flash takes text, image and video.
Can I run GPT-6 Luna or MiniMax M3.1 Flash myself?
MiniMax M3.1 Flash is released as open weights you can run yourself; GPT-6 Luna is available through its provider's API only.
Further reading
More on GPT-6 Luna and MiniMax M3.1 Flash
Articles on GPT-6 Luna and MiniMax M3.1 Flash
- OpenAI Models on Google Cloud: What Changes for AI TeamsOctober 22, 2026
- Claude Sonnet 5.5 vs GPT-6 Luna: Cost, Speed and AccuracySeptember 29, 2026
- GPT-6 Sol vs Claude Opus 5.5, Plus Luna: Best Value per TaskSeptember 24, 2026
- GPT-6 Sol and Luna: Half the Price, and Where Each One FitsSeptember 23, 2026
Related comparisons
- Claude Haiku 5.5 vs GPT-6 Luna
- Beam 1.0 vs MiniMax M3.1 Flash
- GPT-6 Luna vs Mistral Large 4
- Claude Haiku 5.5 vs MiniMax M3.1 Flash
- Claude Sonnet 5.5 vs GPT-6 Luna
- GLM-5.3-Flash vs MiniMax M3.1 Flash
- Claude Opus 5.5 vs GPT-6 Luna
- MiMo-V2.6-Flash vs MiniMax M3.1 Flash
- GPT-5.4 vs GPT-6 Luna
- MiniMax M3.1 Flash vs Muse Spark Open
- GPT-6 Astra vs GPT-6 Luna
- MiniMax M3.1 Flash vs Nemotron 3.5 Super VL
Production evaluation
Choosing between GPT-6 Luna and MiniMax M3.1 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