# MiniMax M3 vs OpenAI GPT-OSS 120B

On provider list prices, OpenAI GPT-OSS 120B costs $0.15 per million input tokens against $0.30 for MiniMax M3: 2.0x apart. Output is $0.60 against $1.20 (2.0x). On Allocate both bill at list plus the 7% transaction fee.

## Specifications

| | MiniMax M3 | OpenAI GPT-OSS 120B |
| --- | --- | --- |
| Lab | MiniMaxAI | OpenAI |
| Access | API only | Open weights |
| Context window | 512K tokens | 128K tokens |
| List price, input | $0.30 / M tokens | $0.15 / M tokens |
| List price, output | $1.20 / M tokens | $0.60 / M tokens |
| Cached input | $0.06 / M tokens | n/a |
| License | Proprietary API | Custom license |
| Fine-tunable | No | Yes |

Specifications and provider list prices from the Allocate catalog, checked 2026-07-08. Billed price is list plus the 7% transaction fee.

## What the numbers say

Take 1,000,000 requests a month at 1,200 input and 350 output tokens each. That workload costs $390 a month on OpenAI GPT-OSS 120B and $780 on MiniMax M3 at list: a gap of $390, or 2.0x.

MiniMax M3 reads 512K tokens per request against 128K for OpenAI GPT-OSS 120B, 4.0x the window. That decides which one can take whole documents without splitting them.

## Choose MiniMax M3 for

- The longer context window (512K vs 128K tokens)
- Published cached-input pricing ($0.06 per M tokens)

## Choose OpenAI GPT-OSS 120B for

- The lower list price ($0.15 in / $0.60 out per M tokens)
- Open weights you can fine-tune and own

## Common questions

### Which is cheaper, MiniMax M3 or OpenAI GPT-OSS 120B?

OpenAI GPT-OSS 120B, on this workload shape. At list prices it is $0.15/$0.60 per million tokens in and out against $0.30/$1.20 for MiniMax M3. Billed on Allocate: $0.16/$0.64 against $0.32/$1.28, list plus 7%.

### Which has the bigger context window?

MiniMax M3: 524,288 tokens (512K) against 131,072 (128K) for OpenAI GPT-OSS 120B.

### Can I fine-tune MiniMax M3 or OpenAI GPT-OSS 120B?

OpenAI GPT-OSS 120B publishes open weights (Custom license) and can be fine-tuned on your own data. MiniMax M3 is a closed model served over API; its weights are not available.

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[HTML page](https://allocate.network/compare/minimaxai-minimax-m3-vs-openai-gpt-oss-120b) · [MiniMax M3](https://allocate.network/models/minimaxai-minimax-m3.md) · [OpenAI GPT-OSS 120B](https://allocate.network/models/openai-gpt-oss-120b.md) · [Machine-readable catalog](https://allocate.network/catalog.json)