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Gemini 2.5 Flash: AI Large Language Models

Gemini 2.5 Flash is Google's high-speed multimodal language model, optimized for rapid text generation, real-time image understanding, and high-frequency tasks. Supports text and image inputs. Token-based pricing: $0.30/M input tokens, $2.50/M output tokens. Two endpoints: standard async (/gemini-2-5-flash) and live streaming (/gemini-2-5-flash/stream) via SSE.

Interactive model controls

Gemini 2.5 Flash is Google's high-speed multimodal language model, optimized for rapid text generation, real-time image understanding, and high-frequency tasks. Supports text and image inputs. Token-based pricing: $0.30/M input tokens, $2.50/M output tokens. Two endpoints: standard async (/gemini-2-5-flash) and live streaming (/gemini-2-5-flash/stream) via SSE.

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Overview

About this model

Gemini 2.5 Flash is Google's high-speed multimodal language model, optimized for rapid text generation, real-time image understanding, and high-frequency tasks. Pricing: $0.30 per million input tokens and $2.50 per million output tokens.

1High-Speed Conversations: Run fast, interactive conversational interfaces.
2Real-time Analytics: Process streaming text and summarize incoming feeds.
3Image Understanding: Rapidly caption, categorize, or describe image inputs.
4Simple Coding Tasks: Generate quick snippets, helper functions, and scripts.
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Pricing & Value

Cost analysis

muapiapp$0.30/M input tokens, $2.50/M output tokens

Token-based billing. Minimum $0.00005 per call. Built for scale.

Fal.ai$0.40/M input tokens, $3.00/M output tokens

muapiapp remains more cost-effective.

Replicate$0.42/M input tokens, $3.10/M output tokens

muapiapp remains more cost-effective.

** Competitor pricing is estimated based on similar model architectures and usage tiers.

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Technical Details

Configuration schema

Promptstring

The user message or instruction for the model.

Default ValueExplain quantum computing in simple terms.
Image URLstring

Optional image URL to include as multimodal input.

Default Valueundefined
System Promptstring

Optional system-level instruction to guide model behavior.

Default ValueYou are a helpful physics teacher.
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Implementation Guide

Developer documentation

Standard (Async)

POST /api/v1/gemini-2-5-flash — returns request_id, poll for result via /api/v1/predictions/{id}/result.

Streaming (SSE)

POST /api/v1/gemini-2-5-flash/stream — returns a live SSE stream. Each chunk: data: {"choices":[{"delta":{"content":"text"}}]}, ending with data: [DONE].

See Streaming Documentation for full code examples.

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Common Questions

Frequently asked

How is pricing calculated?

Pricing is token-based: $0.30 per million input tokens and $2.50 per million output tokens. The minimum charge per call is $0.00005. Actual cost is deducted after each call based on token counts returned by the model.

Does Gemini 2.5 Flash support images?

Yes. Pass an image_url in the request body to include an image as part of the user message.

Does Gemini 2.5 Flash support system prompts?

Yes. You can supply an optional system_prompt field to guide the model's behavior and tone.