Skip to main content
idapt
HomeAI ModelsPricing
Sign inStart free

Gemini 3.5 Flash vs GPT OSS 20B

At a glance
GoogleGemini 3.5 Flash

Google's high-speed thinking model for agentic workflows, chat, and coding.

861.0M ctx$1.50/$9.00 per M#11/92
OpenAIGPT OSS 20B

OpenAI's compact open-weights model for efficient inference.

131K ctx$0.03/$0.14 per M
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
GoogleGemini 3.5 Flash
Reasoning
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Capability
CapabilityECI86.2
Reasoning & Knowledge
Graduate Science92.8%Factual Recall68.4%
Math
Competition Math95.6%Research Math39.0%
Coding
Real-World Coding79.3%
Agentic
Terminal Tasks—Novel Reasoning72.1%
OpenAIGPT OSS 20B
Reasoning
CodingInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch AI·OpenRouter· as of 2026-07-10
Cheaper
Capability
Capability—
Reasoning & Knowledge
Graduate Science—Factual Recall—
Math
Competition Math—Research Math—
Coding
Real-World Coding—
Agentic
Terminal Tasks3.4%Novel Reasoning—
Specs
GoogleGemini 3.5 Flash
1.0M
Context
66K
Max output
May 2026
Released
OpenAIGPT OSS 20B
131K
Context
16K
Max output
Aug 2025
Released
Capabilities
GoogleGemini 3.5 Flash
Vision
Audio
Reasoning
OpenAIGPT OSS 20B
Vision
Audio
Reasoning
Pricing
GoogleGemini 3.5 Flash
Live pricing, shown before you run
Input$1.50/M tokens
Output$9.00/M tokens
Reasoning$9.00/M tokens
Cache read$0.15/M tokens
Cache write$0.08/M tokens
Image input$1.50/M tokens
Audio input$3.00/M tokens
Web search$0.01/search
OpenAIGPT OSS 20B
Live pricing, shown before you run
Input$0.03/M tokens
Output$0.14/M tokens
Chat with Gemini 3.5 FlashGo to model
Chat with GPT OSS 20BGo to model
Frequently Asked Questions: Gemini 3.5 Flash vs GPT OSS 20B▼

Which is better, Gemini 3.5 Flash or GPT OSS 20B?

▼

Both Gemini 3.5 Flash and GPT OSS 20B are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, Gemini 3.5 Flash or GPT OSS 20B?

▼

GPT OSS 20B has a lower blended cost. Gemini 3.5 Flash: $1.50 input / $9.00 output. GPT OSS 20B: $0.03 input / $0.14 output.

Which has a larger context window, Gemini 3.5 Flash or GPT OSS 20B?

▼

Gemini 3.5 Flash has a larger context window: Gemini 3.5 Flash supports 1M tokens vs GPT OSS 20B at 131K tokens.

Do both Gemini 3.5 Flash and GPT OSS 20B support vision?

▼

Gemini 3.5 Flash supports vision/image input, but GPT OSS 20B does not.

What are the key differences between Gemini 3.5 Flash and GPT OSS 20B?

▼

Key differences: GPT OSS 20B is significantly cheaper; only Gemini 3.5 Flash supports vision input. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Gemini 3.5 Flash and GPT OSS 20B for free on idapt.app to see which performs better for your specific needs.

Open in App
  • Home
  • Pricing
  • AI Models
  • Image models
  • Voice models
  • Video models
  • Rankings
  • New models
  • Model status
  • Multi-Model Chat
  • Voice Mode
  • Voice HUD
  • Web Search
  • Image Generation
  • Video Generation
  • Audio Generation
  • Transcription
  • Drive
  • Secrets
  • Sharing
  • Workspaces
  • Tasks
  • Memory
  • Agents
  • Subagents
  • Automations
  • Skills
  • Code Execution
  • Computers
  • Computer Use
  • Cloud Computers
  • Local AI
  • AI Gateway
  • API & SDK
  • CLI
  • MCP
  • Tunnels
  • All features →
  • Blog
  • Use cases
  • Comparisons
  • Best of
  • Learn
  • Free tools
  • Prompts
  • Templates
  • Changelog
  • Help center
  • FAQ
  • Privacy
  • Compare all models
  • Support
  • Developers
  • Quickstarts
  • API reference
  • API pricing
  • CLI
  • MCP
  • Downloads
  • Desktop
  • Badges and embeds
© idapt[email protected]TermsPrivacy PolicyLegal noticeReport content
X (Twitter)