Gemini 3.5 Flash
by Googlegoogle/gemini-3.5-flash
LLMCompare cannot run Gemini 3.5 Flash yet.No route to this model is configured on this site yet. Its prices and parameters are listed below for reference.
See the models that can be run nowGemini 3.5 Flash at a glance
- Context length
- 1,048,576 tokens
- Maximum output
- 65,536 tokens
- Accepts
- Text, Image, File, Audio, Video
- Returns
- Text
- Features
- ReasoningJSON outputTool callingPrompt cachingImage input
- Reasoning effort levels
highmediumlowminimalReasoning is always on for this model.- Released
- 19 May 2026
- Knowledge cutoff
- 1 January 2025
Model facts synced from the OpenRouter model list on 21 Oct 2026.
Gemini 3.5 Flash pricing by route
A route is the service LLMCompare calls to reach the model. Gemini 3.5 Flash has 1 route. Prices are in US dollars.
| Route | On LLMCompare | Inputper 1M tokens | Outputper 1M tokens | Cache readper 1M tokens | Cache writeper 1M tokens | Price verified on | Source |
|---|---|---|---|---|---|---|---|
| OpenRouterDefault | Not configured | $1.50 | $9.00 | $0.15 | $0.0833 | openrouter.ai/google/gemini-3.5-flash |
The cost shown in an LLMCompare report is calculated from these prices as they were at the time of the run.
Cost calculator
Estimate what a batch of calls to Gemini 3.5 Flash costs. The starting numbers are examples. Change them to match your task.
Part of the input tokens above, billed at the cache read price.
Billed in addition to the output tokens.
- Cost per call
- $0.006
- 8 credits
- Cost of 100 calls
- $0.60
- 800 credits
Calculated from the OpenRouter prices verified on 21 Oct 2026. Credits are the cost plus a 20% service fee, at $0.001 per credit, rounded up for each call, with a minimum of 1 per call. A real run is charged for the usage the provider reports.
Parameters you can set
These are the parameters LLMCompare can set when it calls the model through OpenRouter.
| Parameter | Type | Range or options | Default |
|---|---|---|---|
temperature | Number | 0 to 2in steps of 0.1 | Provider default |
top_p | Number | 0 to 1in steps of 0.05 | Provider default |
max_tokens | Integer | 1 to 65,536 | Provider default |
reasoning_effort | One of | highmediumlowminimal | medium |
seed | Integer | -2,147,483,648 to 4,294,967,295 | Provider default |
response_format | One of | textjson_object | Provider default |
About Gemini 3.5 Flash
Gemini 3.5 Flash is Google's high-efficiency multimodal model, bringing near-Pro level coding and reasoning at Flash-tier cost and speed. It is highly optimized for coding proficiency and parallel agentic execution...
Description as published for this model. LLMCompare has not edited it.
Models to compare with Gemini 3.5 Flash
Text models from the same provider and models at the nearest price. The order is not a ranking.
| Add to comparison | Model | Context | Max output | Input priceper 1M tokens | Output priceper 1M tokens | Features | Released | On LLMCompare |
|---|---|---|---|---|---|---|---|---|
Gemini 2.5 Pro Preview 06-05Googlegoogle/gemini-2.5-pro-preview | 1.05M | 65.5k | $1.25 | $10.00 | JSONToolsCacheVision | No route yet | ||
Gemini 4 ArgonGooglegoogle/gemini-4-argon | 1.05M | 944k | $2.00 | $10.00 | ReasoningJSONToolsCacheVision | No route yet | ||
Gemini 3.1 Pro Preview Custom ToolsGooglegoogle/gemini-3.1-pro-preview-customtools | 1.05M | 65.5k | $2.00 | $12.00 | ReasoningJSONToolsCacheVision | No route yet | ||
Pareto 26.9unbiasedunbiased/pareto-26.9 | 262k | 131k | $2.50 | $7.50 | JSONToolsCacheVision | No route yet | ||
o3OpenAIopenai/o3 | 200k | 100k | $2.00 | $8.00 | JSONToolsCacheVision | No route yet | ||
GPT-4.1OpenAIopenai/gpt-4.1 | 1.05M | 32.8k | $2.00 | $8.00 | JSONToolsCacheVision | No route yet |
Questions about Gemini 3.5 Flash
- How much does Gemini 3.5 Flash cost?
- On the OpenRouter route, Gemini 3.5 Flash costs $1.50 per 1 million input tokens and $9.00 per 1 million output tokens, in US dollars. Input tokens that Gemini 3.5 Flash reads from the prompt cache cost $0.15 per 1 million tokens. LLMCompare verified this price on 21 Oct 2026.
- What is the context length of Gemini 3.5 Flash?
- Gemini 3.5 Flash has a context length of 1,048,576 tokens and returns up to 65,536 output tokens in one call.
- What inputs does Gemini 3.5 Flash accept?
- Gemini 3.5 Flash accepts these inputs: Text, Image, File, Audio, Video. Gemini 3.5 Flash returns: Text.
- Which reasoning effort levels does Gemini 3.5 Flash support?
- Gemini 3.5 Flash supports these reasoning effort levels: high, medium, low, minimal. Reasoning is always on for Gemini 3.5 Flash and cannot be turned off.
- Can I test Gemini 3.5 Flash on my own data?
- Not yet. LLMCompare lists the prices and parameters of Gemini 3.5 Flash, but no route to Gemini 3.5 Flash is configured on LLMCompare, so it cannot be selected for an evaluation.