# flatkey.ai

flatkey.ai is a unified AI API gateway, model routing, billing, and operations platform.

## API Protocols

- Router base URL: https://router.flatkey.ai
- OpenAI-compatible Chat Completions: POST https://router.flatkey.ai/v1/chat/completions
- OpenAI-compatible Responses: POST https://router.flatkey.ai/v1/responses
- Anthropic Messages: POST https://router.flatkey.ai/v1/messages
- Gemini native generateContent: POST https://router.flatkey.ai/v1beta/models/{model}:generateContent
- Asynchronous video generation: POST https://router.flatkey.ai/v1/videos

## Gemini Image Models

- nano-banana-pro-preview supports both Gemini native generateContent and OpenAI-compatible Chat Completions.
- With Gemini native generateContent, generated images are returned in candidates[].content.parts[].inlineData.
- With Chat Completions, generated images are returned in choices[0].message.content as Markdown data URIs.
- These Gemini image-model paths currently do not use /v1/images/generations; do not infer lack of Gemini support from that endpoint.

## Seedance Video Models

- Seedance models use the official multimodal content[] request format.
- Create a video task with POST https://router.flatkey.ai/v1/videos.
- Poll task status with GET https://router.flatkey.ai/v1/videos/{task_id}.
- Download completed video content with GET https://router.flatkey.ai/v1/videos/{task_id}/content.
- Use GET /v1/models to discover the Seedance model IDs currently available to your account.
- Documentation: https://docs.flatkey.ai/api-reference/seedance-video-generation
- Chinese documentation: https://docs.flatkey.ai/zh/api-reference/seedance-video-generation

## Core Pages

- Home: https://flatkey.ai/
- Flatkey Tools: https://flatkey.ai/tools
- Flatkey as an Apify alternative: https://flatkey.ai/apify-alternative
- Flatkey CLI: https://flatkey.ai/cli
- Flatkey vs Higgsfield: https://flatkey.ai/higgsfield-alternative
- Model pricing: https://flatkey.ai/pricing
- Rankings: https://flatkey.ai/rankings
- Blog: https://flatkey.ai/blog
- Sitemap: https://flatkey.ai/sitemap.xml

## Blog Categories

- AI Gateway Architecture: https://flatkey.ai/blog/category/ai-gateway-architecture
- Base URL and SDK Migration: https://flatkey.ai/blog/category/base-url-and-sdk-migration
- Cost, Billing, and Ops: https://flatkey.ai/blog/category/cost-billing-and-ops
- Enterprise Controls and Trust: https://flatkey.ai/blog/category/enterprise-controls-and-trust
- Gateway Comparisons: https://flatkey.ai/blog/category/gateway-comparisons
- Model and Modality Playbooks: https://flatkey.ai/blog/category/model-and-modality-playbooks
- Reliability and Routing: https://flatkey.ai/blog/category/reliability-and-routing
- Tool Integrations: https://flatkey.ai/blog/category/tool-integrations

## Blog Articles

- Imagen API Pricing and Routing Checks for OpenAI-Compatible Workflows: https://flatkey.ai/blog/imagen-api-pricing-routing-checks - Use this September 2026 Imagen API pricing and routing checklist to verify Gemini image model prices, deprecations, Flatkey routes, and accepted-image cost before launch.
- GPT Image 2 API Through Flatkey: Pricing, Models, and Request Checks: https://flatkey.ai/blog/gpt-image-2-api-flatkey - Use this GPT Image 2 API Through Flatkey guide to verify model rows, pricing units, endpoint support, and request checks before production traffic.
- Claude vs GPT API Routing: When to Prefer Provider-Specific Models or a Gateway: https://flatkey.ai/blog/claude-vs-gpt-api-routing - A practical decision framework for routing Claude and GPT workloads through direct provider APIs, a Flatkey gateway, or a hybrid architecture.
- AI Model Catalog Guide: How to Read Providers, Endpoints, Groups, and Prices: https://flatkey.ai/blog/ai-model-catalog-guide - Use this AI model catalog guide to read providers, endpoints, groups, availability, pricing units, and usage evidence before production routing.
- GPT Image vs Gemini Image API: Routing and Pricing Questions Before You Choose: https://flatkey.ai/blog/gpt-image-vs-gemini-image-api - Compare GPT Image vs Gemini Image API routing, pricing units, model status, rate limits, and accepted-image cost before production rollout.
- Seedance vs Veo API: Video Generation Routing and Pricing Review: https://flatkey.ai/blog/seedance-vs-veo-api-routing-pricing - Compare Seedance vs Veo API pricing units, route controls, model availability, and production checks before sending creator workflows to video generation APIs.
- Gemini vs Claude API Routing: Cost, Context, Tools, and Reliability Checks: https://flatkey.ai/blog/gemini-vs-claude-api-routing - A practical routing checklist for comparing Gemini and Claude by accepted-output cost, context reliability, tool calling, structured outputs, batch/caching, fallback behavior, and usage-log verification.
- DeepSeek vs Qwen API: OpenAI-Compatible Routing Checks: https://flatkey.ai/blog/deepseek-vs-qwen-api-routing - Compare DeepSeek vs Qwen API routing with OpenAI-compatible base URL checks, region/workspace rules, tool calls, streaming, pricing units, and Flatkey tests.
- GPT Image vs Imagen API: Pricing Units and Request Checks: https://flatkey.ai/blog/gpt-image-vs-imagen-api - A current comparison of GPT Image and Google's post-Imagen image-generation path, with pricing units, request checks, rate-limit checks, and migration guidance.
- Speech-to-Text API Routing: How to Balance Transcription Cost, Latency, and Data Controls: https://flatkey.ai/blog/speech-to-text-api-routing - Use this speech-to-text API routing framework to compare transcription cost, latency classes, fallback behavior, and data controls before production rollout.
- Regional LLM Provider Routing: When DeepSeek, Qwen, and Local Providers Need Separate Checks: https://flatkey.ai/blog/regional-llm-provider-routing - A practical provider-check framework for routing DeepSeek, Qwen, and local LLM gateways with region, compatibility, capacity, cost, and fallback controls.
- OCR Model Routing: How to Balance Text Extraction Cost, Quality, and Fallback Checks: https://flatkey.ai/blog/ocr-model-routing - Use this OCR model routing framework to compare OCR API cost, extraction quality, and fallback constraints before standardizing document AI traffic.
- Fallback Routing for LLM APIs: Multimodal Agent Routing for Text, Image, Audio, and Video: https://flatkey.ai/blog/multimodal-agent-routing - A practical fallback routing playbook for multimodal AI agents that handle text, image, audio, and video API workflows.
- Kimi 3 API (Kimi K3): What Developers Need to Know: https://flatkey.ai/blog/kimi-3-api-kimi-k3-access-guide - A current, source-backed guide to Kimi K3 API access, pricing, reasoning settings, multimodal limits, migration checks, and Flatkey routing.
- Seedance API Evaluation Framework for Text-to-Video Product Teams: https://flatkey.ai/blog/seedance-api-evaluation-framework-product-teams - A repeatable framework for evaluating Seedance API quality, reliability, user experience, safety, and cost before a text-to-video product rollout.
- DeepSeek V4 Pro vs Flash: Which Model Fits Your API Workflow?: https://flatkey.ai/blog/deepseek-v4-pro-vs-flash - Compare DeepSeek V4 Pro vs Flash after the V4.1 Flash update, including the September 14 Pro routing change and API workflow checks.
- How to Use an OpenAI API Alternative in 2026: https://flatkey.ai/blog/how-to-use-openai-api-alternative-2026 - Learn how to test an OpenAI API alternative with a reversible base_url migration, smoke tests, fallback rules, usage logs, and rollout metrics.
- LLM API Metrics That Actually Matter: https://flatkey.ai/blog/llm-api-metrics-that-actually-matter - A practical scorecard for measuring LLM API reliability, latency, cost, retries, fallbacks, context efficiency, and auditability.