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MiniMax M3 vs GPT-5.5
GPT-5.5 scores higher than MiniMax M3 on all 5 public leaderboards that rate both. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, MiniMax M3 is at 6.5 and GPT-5.5 at 44.8 (out of 100).
Scores as published by each board; table composed September 25, 2026.
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Leaderboard by leaderboard
| Board | MiniMax M3 | GPT-5.5 | Higher |
|---|---|---|---|
| LMArena Elo (community votes) | 1,485.1 | 1,510.1 | GPT-5.5 |
| LiveBench global average (0-100) | 67.3 | 80.2 | GPT-5.5 |
| SimpleBench AVG@5 % (private set) | 45.8 | 76.9 | GPT-5.5 |
| Vals AI Vals Index accuracy % · weighted finance + coding tasks | 42.7 | 57.4 | GPT-5.5 |
| Artificial Analysis intelligence index · measured runs only | 29.2 | 38.4 | GPT-5.5 |
Raw scores are each board's own scale, so compare within a row, not across rows. Full table: the bench index.
MiniMax M3 at a glance
- Developer
- MiniMax
- Status
- Live since May 31, 2026
- API price
- $0.30 input / $1.20 output per 1M tokens · MiniMax, MiniMax-M3
- Context window
- 1M tokens
Live — $0.30/$1.20 per 1M.
GPT-5.5 at a glance
- Developer
- OpenAI
- Status
- Live since April 24, 2026
- API price
- $5 input / $30 output per 1M tokens · OpenAI, gpt-5.5
- Context window
- 1.05M tokens
Live.
MiniMax M3 vs GPT-5.5: quick answers
Which is better, MiniMax M3 or GPT-5.5?
It depends on what you measure. GPT-5.5 scores higher than MiniMax M3 on all 5 public leaderboards that rate both. GPT-5.5's widest lead is on LiveBench. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, MiniMax M3 is at 6.5 and GPT-5.5 at 44.8 (out of 100).
Which is newer, MiniMax M3 or GPT-5.5?
MiniMax M3. It went live on May 31, 2026, 37 days after GPT-5.5 (April 24, 2026).
Which is cheaper, MiniMax M3 or GPT-5.5?
MiniMax M3 is cheaper on both input and output. On each vendor's own API, MiniMax M3 is $0.30 input / $1.20 output per million tokens and GPT-5.5 is $5 input / $30 output per million tokens. MiniMax M3's rate rises for prompts over 512K tokens; GPT-5.5's rate rises for prompts over 272K tokens. Prices as published in the models.dev catalog, as of 2026-09-25.
Which has the bigger context window, MiniMax M3 or GPT-5.5?
GPT-5.5, at 1.05M tokens against MiniMax M3's 1M, as each vendor lists it.
Who makes MiniMax M3 and GPT-5.5?
MiniMax M3 is from MiniMax; GPT-5.5 is from OpenAI.
Where do these numbers come from?
Each score is the leaderboard's own published figure, read by ArtificialWatch (table composed September 25, 2026). Boards measure different things, so raw scores are only comparable within a row.
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Also: the bench index · API pricing · the wire