Model Comparison
MiniMax M3 vs GPT-5.5Which is better in 2026?
GPT-5.5 significantly outperforms across most benchmarks. MiniMax M3 is 21.4x cheaper per token.
Verdict: MiniMax M3 vs GPT-5.5 — which is better?
MiniMax M3 (by MiniMax) and GPT-5.5 (by OpenAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.
MiniMax M3 outperforms in 2 benchmarks (GDPval-AA, SWE-Bench Pro), while GPT-5.5 is better at 7 benchmarks (BrowseComp, Finance Agent v2, LiveBench, MCP Atlas, MMMU-Pro, OfficeQA Pro, OSWorld-Verified). GPT-5.5 significantly outperforms across most benchmarks.
On price, MiniMax M3 is roughly 21.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-5.5 also accepts a larger context window (1,050,000 input tokens), making it the stronger choice for long documents and large codebases.
Choose MiniMax M3 if…
- cost matters — it's about 21.4x cheaper per token
- you want the most recent training data — it shipped Jun 2026
- you need open weights you can self-host or fine-tune
Choose GPT-5.5 if…
- you want the strongest raw capability — it leads on 7 of 9 shared benchmarks
- you process long inputs — it offers a 1,050,000 token context window
Performance Benchmarks
Comparative analysis across standard metrics
MiniMax M3 outperforms in 2 benchmarks (GDPval-AA, SWE-Bench Pro), while GPT-5.5 is better at 7 benchmarks (BrowseComp, Finance Agent v2, LiveBench, MCP Atlas, MMMU-Pro, OfficeQA Pro, OSWorld-Verified).
GPT-5.5 significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, MiniMax M3 ($0.30/1M tokens) is 16.7x cheaper than GPT-5.5 ($5.00/1M tokens).
For output processing, MiniMax M3 ($1.20/1M tokens) is 25.0x cheaper than GPT-5.5 ($30.00/1M tokens).
In conclusion, GPT-5.5 is more expensive than MiniMax M3.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5.5 accepts 1,050,000 input tokens compared to MiniMax M3's 512,000 tokens. MiniMax M3 can generate longer responses up to 131,072 tokens, while GPT-5.5 is limited to 128,000 tokens.
Input Capabilities
Supported data types and modalities
Both MiniMax M3 and GPT-5.5 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
MiniMax M3
GPT-5.5
License
Usage and distribution terms
MiniMax M3 is licensed under MIT, while GPT-5.5 uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
MIT
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
MiniMax M3 was released on 2026-06-01, while GPT-5.5 was released on 2026-04-23.
MiniMax M3 is 1 month newer than GPT-5.5.
Jun 1, 2026
1 months ago
1mo newerApr 23, 2026
2 months ago
Knowledge Cutoff
When training data ends
GPT-5.5 has a documented knowledge cutoff of 2025-12-01, while MiniMax M3's cutoff date is not specified.
We can confirm GPT-5.5's training data extends to 2025-12-01, but cannot make a direct comparison without MiniMax M3's cutoff date.
—
Dec 2025
Provider Availability
MiniMax M3 is available from Fireworks, Novita, Together, MiniMax. GPT-5.5 is available from OpenAI.
MiniMax M3
GPT-5.5
Outputs Comparison
Key Takeaways
MiniMax M3
View detailsMiniMax
GPT-5.5
View detailsOpenAI
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against MiniMax M3 and GPT-5.5 side-by-side, then vote on the output you prefer.
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FAQ
Common questions about MiniMax M3 vs GPT-5.5.