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GPT 5.4 vs Gemini 3.5 Flash

At a glance

OpenAI's latest frontier model, unifying the Codex and GPT lines into one system.

871.1M ctx$2.50/$15.00 per M#7/92

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

861.0M ctx$1.50/$9.00 per M#11/92
Agent Demos
All agent demos

No shared agent demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
Reasoning
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Smarter1%
Capability
CapabilityECI1%87.4
Reasoning & Knowledge
Graduate Science1%93.3%Expert-Level36.2%Factual Recall44.8%
Math
Competition Math95.3%Research Math22%47.6%
Coding
Real-World Coding76.9%
Agentic
Novel Reasoning3%74.0%Task Horizon5.7h
Reasoning
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Cheaper40%
Capability
CapabilityECI86.2
Reasoning & Knowledge
Graduate Science92.8%Expert-Level—Factual Recall53%68.4%
Math
Competition Math95.6%Research Math39.0%
Coding
Real-World Coding3%79.3%
Agentic
Novel Reasoning72.1%Task Horizon—
Specs
1.1M
Context
128K
Max output
Mar 2026
Released
1.0M
Context
66K
Max output
May 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input$2.50/M tokens
Output$15.00/M tokens
Cache read$0.25/M tokens
Web search29%$0.01/search
Live pricing, shown before you run
Input40%$1.50/M tokens
Output40%$9.00/M tokens
Reasoning$9.00/M tokens
Cache read40%$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
Chat with GPT 5.4Go to model
Chat with Gemini 3.5 FlashGo to model
Frequently Asked Questions: GPT 5.4 vs Gemini 3.5 Flash▼

Which is better, GPT 5.4 or Gemini 3.5 Flash?

▼

Based on the Capability Index, GPT 5.4 scores higher (87.4 vs 86.2). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.

Which is cheaper, GPT 5.4 or Gemini 3.5 Flash?

▼

Gemini 3.5 Flash has a lower blended cost. GPT 5.4: $2.50 input / $15.00 output. Gemini 3.5 Flash: $1.50 input / $9.00 output.

Which has a larger context window, GPT 5.4 or Gemini 3.5 Flash?

▼

GPT 5.4 has a larger context window: GPT 5.4 supports 1.1M tokens vs Gemini 3.5 Flash at 1M tokens.

Do both GPT 5.4 and Gemini 3.5 Flash support vision?

▼

Yes, both GPT 5.4 and Gemini 3.5 Flash support vision/image input.

Which has better coding performance, GPT 5.4 or Gemini 3.5 Flash?

▼

Gemini 3.5 Flash scores higher on SWE-bench Verified: GPT 5.4 resolves 77% vs Gemini 3.5 Flash at 79%.

What are the key differences between GPT 5.4 and Gemini 3.5 Flash?

▼

GPT 5.4 and Gemini 3.5 Flash have similar overall capabilities. The main differences lie in pricing, context window size, and provider-specific strengths. Use this comparison page to review all metrics side by side.

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 GPT 5.4 and Gemini 3.5 Flash for free on idapt.app to see which performs better for your specific needs.

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