Model comparison

Gemini 3.5 Flash vs GPT-5.5

Compare Gemini 3.5 Flash (Google) and GPT-5.5 (OpenAI) by price, context, capabilities, and latency.

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Price deadline

Gemini Flash prices rise Jan 1, 2027

Per Google's published pricing page, Gemini Flash input prices double on Jan 1, 2027. The same workload runs an order of magnitude cheaper on DeepSeek and GLM. Source: Google pricing Full price breakdown

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Which should you pick?

  • Price: Gemini 3.5 Flash is cheaper ($1.50 / 1M tokens input / $9 / 1M tokens output) vs GPT-5.5 ($5 / 1M tokens input / $30 / 1M tokens output).

Side by side

Gemini 3.5 Flash vs GPT-5.5 — full comparison

Compare price, provider, context, capabilities, latency, and source basis.

ModelProviderInputOutputContextCapabilitiesBest forLatencyStatusSource
Gemini 3.5 Flashgoogle/gemini-3.5-flashGoogle$1.50 / 1M tokens$9 / 1M tokens1M
StreamingTool callingJSON modeVision
image understanding, multimodal chat0-0msCatalogPlatform curated
GPT-5.5openai/gpt-5.5OpenAIStarting at $5 / 1M tokens$30 / 1M tokens1M
StreamingTool callingJSON modeVision
image understanding, multimodal chat1501-3028msCatalogPlatform curated

FAQ

Gemini 3.5 Flash vs GPT-5.5 FAQ

Is Gemini 3.5 Flash or GPT-5.5 cheaper?

Gemini 3.5 Flash is cheaper ($1.50 / 1M tokens input / $9 / 1M tokens output) vs GPT-5.5 ($5 / 1M tokens input / $30 / 1M tokens output). Actual cost depends on your input/output token mix — estimate it with the pricing calculator.

Which has a larger context window, Gemini 3.5 Flash or GPT-5.5?

Both offer the same context window: 1M tokens.

Gemini 3.5 Flash vs GPT-5.5 for Vision: which should I pick?

Both target Vision. Pick Gemini 3.5 Flash to optimize cost, or Gemini 3.5 Flash for the longer context window. Test both on real prompts before committing production traffic.

Gemini 3.5 Flash detailsGPT-5.5 detailsPricing calculatorOpenAI-compatible quickstart