Gemini 3.1 Pro Preview vs gpt-oss-120b
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for Gemini 3.1 Pro Preview and gpt-oss-120b.
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. Building on the multimodal foundation...
gpt-oss-120b
gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimized...
Technical Specifications
| Specification | Gemini 3.1 Pro Preview | gpt-oss-120b |
|---|---|---|
| Provider | OpenAI | |
| Context Window | 1,048,576 tokens | 131,072 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | beta | stable |
| API Available | Yes | Yes |
| Released Date | 2026-02-19 | 2025-08-05 |
API Pricing Comparison
Input Price per Million Tokens
Gemini 3.1 Pro Preview
$2.00
gpt-oss-120b
$0.03
Output Price per Million Tokens
Gemini 3.1 Pro Preview
$12.00
gpt-oss-120b
$0.15
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Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
Gemini 3.1 Pro Preview Quirks & Gotchas
No developer gotchas reported.
gpt-oss-120b Quirks & Gotchas
No developer gotchas reported.