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OpenAI

Gemini 2.5 Flash vs GPT-OSS-20b

A detailed comparison of pricing, benchmarks, and capabilities

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Key Takeaways

Gemini 2.5 Flash wins:

  • Larger context window

GPT-OSS-20b wins:

  • Cheaper input tokens
  • Cheaper output tokens
  • Faster response time
  • Higher intelligence benchmark
  • Better at coding
  • Better at math
Price Advantage
GPT-OSS-20b
Benchmark Advantage
GPT-OSS-20b
Context Window
Gemini 2.5 Flash
Speed
GPT-OSS-20b

Pricing Comparison

Benchmark Comparison

Context & Performance

Capabilities

Feature Comparison

FeatureGemini 2.5 FlashGPT-OSS-20b
Vision (Image Input)
Tool/Function Calls
Reasoning Mode
Audio Input
Audio Output
PDF Input
Prompt Caching
Web Search

License & Release

PropertyGemini 2.5 FlashGPT-OSS-20b
LicenseProprietaryOpen Source
AuthorGoogleOpenAI
ReleasedJun 2025Aug 2025

Gemini 2.5 Flash Modalities

Input
fileimagetextaudiovideo
Output
text

GPT-OSS-20b Modalities

Input
text
Output
text

Related Comparisons

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Frequently Asked Questions

GPT-OSS-20b has cheaper input pricing at $0.03/M tokens. GPT-OSS-20b has cheaper output pricing at $0.10/M tokens.
GPT-OSS-20b scores higher on coding benchmarks with a score of 18.5, compared to Gemini 2.5 Flash's score of 17.8.
Gemini 2.5 Flash has a 1,048,576 token context window, while GPT-OSS-20b has a 131,072 token context window.
Gemini 2.5 Flash supports vision. GPT-OSS-20b supports vision.

Built by @aellman

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