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  1. Home
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  3. Compare

Gemini 3 Flash Preview vs Step 3.5 Flash

Compare Gemini 3 Flash Preview from Google and Step 3.5 Flash from stepfun on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.

Favicon for google
Gemini 3 Flash Preview
Favicon for stepfun
Step 3.5 Flash
Favicon for google
Gemini 3 Flash Preview
Favicon for stepfun
Step 3.5 Flash

Overview

Gemini 3 Flash Preview
Author
Google
Step 3.5 Flash
Author
stepfun
Gemini 3 Flash Preview
Context length
1.05Mtokens
Step 3.5 Flash
Context length
262Ktokens
Gemini 3 Flash Preview
Reasoning
Step 3.5 Flash
Reasoning
Gemini 3 Flash Preview
Input modalities
Step 3.5 Flash
Input modalities
Gemini 3 Flash Preview
Output modalities
Step 3.5 Flash
Output modalities

Gemini 3 Flash Preview vs Step 3.5 Flash: side-by-side summary

Gemini 3 Flash Preview and Step 3.5 Flash are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Gemini 3 Flash Preview, from Google, has a 1,048,576-token context window and is priced at $0.50/M tokens input, $3/M tokens output on OpenRouter.

Step 3.5 Flash, from stepfun, has a 262,144-token context window and is priced at $0.10/M tokens input, $0.30/M tokens output on OpenRouter.

Context window
  • Gemini 3 Flash Preview: 1,048,576 tokens
  • Step 3.5 Flash: 262,144 tokens
Price
  • Gemini 3 Flash Preview: $0.50/M tokens input, $3/M tokens output
  • Step 3.5 Flash: $0.10/M tokens input, $0.30/M tokens output
Provided by
  • Gemini 3 Flash Preview: Google
  • Step 3.5 Flash: stepfun
  • Gemini 3 Flash Preview model details, providers and pricing
  • Step 3.5 Flash model details, providers and pricing

Gemini 3 Flash Preview vs Step 3.5 Flash at a glance

Gemini 3 Flash Preview vs Step 3.5 Flash comparison
Gemini 3 Flash PreviewStep 3.5 Flash
Input price$0.50/M tokens$0.10/M tokens
Output price$3/M tokens$0.30/M tokens
Context window1,048,576 tokens262,144 tokens
Intelligence Index26.317.0
Coding IndexNot availableNot available
Agentic IndexNot availableNot available
Latency (p50)2.48 s1.34 s
Throughput (p50)103.0 tok/s65.0 tok/s

Oct 5, 2026

Is Gemini 3 Flash Preview cheaper than Step 3.5 Flash?

Step 3.5 Flash is cheaper than Gemini 3 Flash Preview on OpenRouter: Step 3.5 Flash costs $0.10/M tokens input and $0.30/M tokens output, while Gemini 3 Flash Preview costs $0.50/M tokens input and $3/M tokens output.

Which has the longer context window, Gemini 3 Flash Preview or Step 3.5 Flash?

Gemini 3 Flash Preview has the longer context window at 1,048,576 tokens, compared with 262,144 tokens for Step 3.5 Flash.

Which is faster, Gemini 3 Flash Preview or Step 3.5 Flash?

Gemini 3 Flash Preview is faster on OpenRouter, generating a median 103.0 tokens per second compared with 65.0 tokens per second for Step 3.5 Flash.

Attribute
Benchmark data updated
Frequently asked questions