Google Gemini 3.8 Flash: AI Large Language Models
Generate text and analyze images with Google Gemini 3.8 Flash. Fast, low-cost multimodal chat and reasoning. Try free — pay per generation.
Generate text and analyze images with Google Gemini 3.8 Flash. Fast, low-cost multimodal chat and reasoning. Try free — pay per generation.
About this model
Gemini 3.8 Flash is Google's latest high-speed multimodal language model, built for real-time chat, coding, and agentic workloads. It accepts text and image inputs in a single request, supports a configurable system prompt, and offers adjustable reasoning depth for balancing latency against thoroughness. Its large context window and low latency make it a strong fit for production chat assistants, document summarization, and coding copilots that need fast, cheap responses at scale. For heavier reasoning workloads that need a larger context or deeper multi-step logic, see Gemini 3.1 Pro or Gemini 3 Pro.
Cost analysis
| Provider | Cost | Notes |
|---|---|---|
| muapiapp | $2.50/M input, $12.50/M output | Token-based billing. Minimum $0.0002 per call. |
| Fal.ai | Not available | No dedicated Gemini 3.8 Flash endpoint at this time. |
| Replicate | Not available | No dedicated Gemini 3.8 Flash endpoint at this time. |
Token-based billing. Minimum $0.0002 per call.
No dedicated Gemini 3.8 Flash endpoint at this time.
No dedicated Gemini 3.8 Flash endpoint at this time.
** Competitor pricing is estimated based on similar model architectures and usage tiers.
Configuration schema
| Parameter | Type | Description | Default |
|---|---|---|---|
| Prompt | string | The user message or instruction for the model. | Summarize the key points of the attached image. |
| Image URL | string | Optional image URL to include as multimodal input. | undefined |
| System Prompt | string | Optional system-level instruction to guide model behavior. | You are a helpful assistant that responds concisely. |
The user message or instruction for the model.
Summarize the key points of the attached image.Optional image URL to include as multimodal input.
undefinedOptional system-level instruction to guide model behavior.
You are a helpful assistant that responds concisely.Developer documentation
POST /api/v1/gemini-3-8-flash — returns a request_id; poll for the result via /api/v1/predictions/{id}/result.
POST /api/v1/gemini-3-8-flash/stream — returns a live Server-Sent Events stream (Content-Type: text/event-stream) with incremental text chunks as the model generates its response.
curl -X POST "https://api.muapi.ai/api/v1/gemini-3-8-flash" \
-H "Authorization: Bearer $YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"prompt": "Summarize the key differences between REST and GraphQL APIs.",
"system_prompt": "You are a concise technical writer."
}'
Frequently asked
Gemini 3.8 Flash is Google's fast, cost-efficient multimodal language model for text and image understanding, tuned for real-time chat, summarization, and coding assistance.
Pricing is token-based at $2.50 per million input tokens and $12.50 per million output tokens, with a minimum charge of $0.0002 per call.
Yes. Pass an image_url alongside your prompt to ask questions about, summarize, or describe an image in the same request.
Yes, use the system_prompt field to steer the model's tone, persona, or response format across the conversation.
Use the streaming endpoint (/gemini-3-8-flash/stream) for interactive chat UIs where the user should see the response appear token-by-token. Use the async endpoint (/gemini-3-8-flash) for background jobs, batch processing, and workflow automation.
Both are fast multimodal chat models in the same family; Gemini 3.8 Flash is Google's newer release with improved reasoning and response quality at the same input/output field structure, so existing integrations built for 3.7 Flash migrate over with no code changes beyond the endpoint name.