Model Comparison

GPT OSS 20B vs Pixtral-12B

GPT OSS 20B significantly outperforms across most benchmarks. GPT OSS 20B is 1.7x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

GPT OSS 20B outperforms in 1 benchmarks (MMLU), while Pixtral-12B is better at 0 benchmarks.

GPT OSS 20B significantly outperforms across most benchmarks.

Thu Apr 30 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT OSS 20B costs less

For input processing, GPT OSS 20B ($0.05/1M tokens) is 3.0x cheaper than Pixtral-12B ($0.15/1M tokens).

For output processing, GPT OSS 20B ($0.20/1M tokens) is 1.3x more expensive than Pixtral-12B ($0.15/1M tokens).

In conclusion, Pixtral-12B is more expensive than GPT OSS 20B.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Thu Apr 30 2026 • llm-stats.com
OpenAI
GPT OSS 20B
Input tokens$0.05
Output tokens$0.20
Best providerNovita
Mistral AI
Pixtral-12B
Input tokens$0.15
Output tokens$0.15
Best providerMistral
Notice missing or incorrect data?Start an Issue→

Model Size

Parameter count comparison

8.5B diff

GPT OSS 20B has 8.5B more parameters than Pixtral-12B, making it 68.5% larger.

OpenAI
GPT OSS 20B
20.9Bparameters
Mistral AI
Pixtral-12B
12.4Bparameters
20.9B
GPT OSS 20B
12.4B
Pixtral-12B

Context Window

Maximum input and output token capacity

GPT OSS 20B accepts 131,072 input tokens compared to Pixtral-12B's 128,000 tokens. GPT OSS 20B can generate longer responses up to 32,768 tokens, while Pixtral-12B is limited to 8,192 tokens.

OpenAI
GPT OSS 20B
Input131,072 tokens
Output32,768 tokens
Mistral AI
Pixtral-12B
Input128,000 tokens
Output8,192 tokens
Thu Apr 30 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Pixtral-12B supports multimodal inputs, whereas GPT OSS 20B does not.

Pixtral-12B can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT OSS 20B

Text
Images
Audio
Video

Pixtral-12B

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under Apache 2.0.

Both models share the same licensing terms, providing consistent usage rights.

GPT OSS 20B

Apache 2.0

Open weights

Pixtral-12B

Apache 2.0

Open weights

Release Timeline

When each model was launched

GPT OSS 20B was released on 2025-08-05, while Pixtral-12B was released on 2024-09-17.

GPT OSS 20B is 11 months newer than Pixtral-12B.

GPT OSS 20B

Aug 5, 2025

8 months ago

10mo newer
Pixtral-12B

Sep 17, 2024

1.6 years ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

GPT OSS 20B is available from Novita, Fireworks, Groq, OpenAI. Pixtral-12B is available from Mistral AI.

GPT OSS 20B

novita logo
Novita
Input Price:Input: $0.05/1MOutput Price:Output: $0.20/1M
fireworks logo
Fireworks
Input Price:Input: $0.10/1MOutput Price:Output: $0.50/1M
groq logo
Groq
Input Price:Input: $0.10/1MOutput Price:Output: $0.50/1M
openai logo
OpenAI
Input Price:Input: $0.10/1MOutput Price:Output: $0.50/1M

Pixtral-12B

mistral logo
Mistral
Input Price:Input: $0.15/1MOutput Price:Output: $0.15/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (131,072 tokens)
Less expensive input tokens
Higher MMLU score (85.3% vs 69.2%)
Mistral AI
Supports multimodal inputs
Less expensive output tokens

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT OSS 20B
Mistral AI
Pixtral-12B

FAQ

Common questions about GPT OSS 20B vs Pixtral-12B

GPT OSS 20B significantly outperforms across most benchmarks. GPT OSS 20B is made by OpenAI and Pixtral-12B is made by Mistral AI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
GPT OSS 20B scores MMLU: 85.3%, CodeForces: 74.3%, GPQA: 71.5%, TAU-bench Retail: 54.8%, HealthBench: 42.5%. Pixtral-12B scores DocVQA: 90.7%, ChartQA: 81.8%, VQAv2: 78.6%, MT-Bench: 76.8%, HumanEval: 72.0%.
GPT OSS 20B is 3.0x cheaper for input tokens. GPT OSS 20B costs $0.05/M input and $0.20/M output via novita. Pixtral-12B costs $0.15/M input and $0.15/M output via mistral.
GPT OSS 20B supports 131K tokens and Pixtral-12B supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (131K vs 128K), input pricing ($0.05 vs $0.15/M), multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.
GPT OSS 20B is developed by OpenAI and Pixtral-12B is developed by Mistral AI.