MiniMax-M2.5 vs Grok 4.3 vs GPT-5.4 nano
Too close to call on our weighted score (GPT-5.4 nano 68, Grok 4.3 67, MiniMax-M2.5 61). The right pick depends on what you value most.
MiniMaxMiniMax-M2.5
61/100- ECI146.7
- Price$0.30 / $1.20
- Context205K
xAIGrok 4.3
67/100- ECI149.2
- Price$1.25 / $2.50
- Context1M
OpenAIGPT-5.4 nano
68/100- ECI145.8
- Price$0.20 / $1.25
- Context400K
Too close to call
It is close. Our weighted score puts them within 1 points (GPT-5.4 nano 68/100, Grok 4.3 67/100, MiniMax-M2.5 61/100), so choose by what matters most for your work: Grok 4.3 for raw capability and GPT-5.4 nano on price. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
- CapabilityGrok 4.3Capabilities Index (ECI): Grok 4.3 149.2 · MiniMax-M2.5 146.7 · GPT-5.4 nano 145.8
- Lowest priceGPT-5.4 nanoGPT-5.4 nano $0.463 · MiniMax-M2.5 $0.525 · Grok 4.3 $1.56 per 1M tokens (3:1 blend)
- Longest contextGrok 4.3Grok 4.3 1,000,000 · GPT-5.4 nano 400,000 · MiniMax-M2.5 204,800 tokens
- Widest inputsGrok 4.3MiniMax-M2.5: Text · Grok 4.3: Text, Images, PDFs · GPT-5.4 nano: Text, Images
- Self-hostingMiniMax-M2.5Publishes downloadable weights
| Measure | Weight | MiniMax-M2.5 | Grok 4.3 | GPT-5.4 nano |
|---|---|---|---|---|
| CapabilityCapabilities Index (ECI) | 50% | 74 | 77 | 73 |
| Price | 25% | 63 | 41 | 66 |
| Inputs & features | 15% | 35 | 80 | 70 |
| Context window | 10% | 32 | 60 | 44 |
| Overall | 100% | 61/100 | 67/100 | 68/100 |
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | MiniMax-M2.5MiniMax | Grok 4.3xAI | GPT-5.4 nanoOpenAI |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | 146.7 | 149.2 (best) | 145.8 |
| ECI rank | #66 of 148 | #55 of 148 (best) | #75 of 148 |
| GPQA DiamondGraduate-level science questions | — | 88.8% (best) | 78.5% |
| FrontierMath Tiers 1–3Research-level mathematics | — | 42.8% | 44.9% (best) |
| OTIS Mock AIME 2024–2025Competition mathematics | — | 93.3% (best) | 87.8% |
| SimpleQA VerifiedShort factual questions | — | 33.2% (best) | 11.7% |
| Price per million tokens | |||
| Input | $0.30 | $1.25 | $0.20 (best) |
| Output | $1.20 (best) | $2.50 | $1.25 |
| Cached input | $0.03 | $0.20 | $0.02 (best) |
| Blended (3:1) | $0.525 | $1.56 | $0.463 (best) |
| Long-context rate | Same rate | Over 200K: $2.50 / $5.00 | Same rate |
| Price source | Official MiniMax (minimax.io) API | Official xAI API | Official OpenAI API |
| Limits | |||
| Context window | 204,800 tokens | 1,000,000 tokens (best) | 400,000 tokens |
| Max output | 131,072 tokens (best) | 30,000 tokens | 128,000 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | No | Yes | Yes |
| PDFs | No | Yes | No |
| Audio | No | No | No |
| Video | No | No | No |
| Reasoning | Yes | Yeslow · medium · high | Yeslow · medium · high · xhigh |
| Tool calling | Yes | Yes | Yes |
| Structured output | No | Yes | Yes |
| Availability | |||
| Weights | Open | Proprietary | Proprietary |
| API model ID | MiniMax-M2.5 | grok-4.3 | gpt-5.4-nano |
| API providers | 21 | 27 (best) | 26 |
| Released | Feb 12, 2026 | Apr 17, 2026 | Mar 17, 2026 |
| Knowledge cutoff | — | — | Aug 31, 2025 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- MiniMax-M2.5$5.40
- Grok 4.3$17.50
- GPT-5.4 nano$4.50
Which should you choose?
Which is better: MiniMax-M2.5, Grok 4.3 or GPT-5.4 nano?
It is close. Our weighted score puts them within 1 points (GPT-5.4 nano 68/100, Grok 4.3 67/100, MiniMax-M2.5 61/100), so choose by what matters most for your work: Grok 4.3 for raw capability and GPT-5.4 nano on price. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
Which is cheaper, MiniMax-M2.5, Grok 4.3 or GPT-5.4 nano?
GPT-5.4 nano is cheaper at $0.20 input / $1.25 output per million tokens (official OpenAI API price). MiniMax-M2.5 costs $0.30 input / $1.20 output per million tokens (official MiniMax (minimax.io) API price); Grok 4.3 costs $1.25 input / $2.50 output per million tokens (official xAI API price). At a typical mix of three input tokens to one output token, that is $0.463 per million tokens for GPT-5.4 nano versus $0.525 for MiniMax-M2.5 (1.1× as much) and $1.56 for Grok 4.3 (3.4× as much).
Which scores higher on benchmarks?
Grok 4.3 scores higher on the Capabilities Index (ECI): Grok 4.3 149.2 (#55 of 148), MiniMax-M2.5 146.7 (#66 of 148) and GPT-5.4 nano 145.8 (#75 of 148). The confidence ranges of the top two overlap (147.6–150.8 vs 142.3–147.9), so treat the gap as small.
Which is better for coding?
There are no published SWE-bench Verified results for MiniMax-M2.5, Grok 4.3 and GPT-5.4 nano yet, so there is no like-for-like coding score. On overall capability, Grok 4.3 leads, which tends to carry over to coding, but test on your own codebase. All three support tool calling for agent workflows.
Which has the bigger context window?
Grok 4.3 has the largest context window at 1,000,000 tokens, against 400,000 for GPT-5.4 nano and 204,800 for MiniMax-M2.5. Maximum output per response: MiniMax-M2.5 up to 131,072, Grok 4.3 up to 30,000, GPT-5.4 nano up to 128,000 tokens.
Which can read images, PDFs, audio or video?
MiniMax-M2.5 accepts text; Grok 4.3 accepts text, images and PDFs; GPT-5.4 nano accepts text and images. Grok 4.3 handles the widest range of inputs.
Are any of these open source?
MiniMax-M2.5 publishes its weights and can be self-hosted; Grok 4.3 and GPT-5.4 nano is proprietary.
Which is newer?
Grok 4.3 is the newest, released Apr 17, 2026. GPT-5.4 nano came out Mar 17, 2026; MiniMax-M2.5 came out Feb 12, 2026. Knowledge cutoff: GPT-5.4 nano Aug 31, 2025.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.
