About This Site
Unified AI API gateway for multi-model access, routing, and cost control. flatkey.ai is a unified AI API gateway and model operations platform designed for production AI teams. It unifies model access, routing, billing, usage analytics, and operational controls into a single platform. Instead of managing multiple separate provider accounts, scattered API keys, and fragmented usage tracking, developers can access over 200 connected AI models (including GPT, Claude, Gemini, and DeepSeek) using just one API key, one base URL, and a centralized dashboard.
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ApiModels
APIMODELS is a unified AI model API that puts 100+ image, video, music, speech and LLM models behind one endpoint, one API key and one balance. Instead of opening an account with OpenAI, Google, Anthropic, ByteDance, Suno, ElevenLabs, MiniMax, xAI, DeepSeek, Alibaba and Zhipu separately — each with its own SDK, billing and approval process — you sign up once and switch models by changing a single string. Flagship image models, priced per image with no token math: • Nano Banana Pro (gemini-3-pro-image-preview) — $0.06 at 1K and 2K, $0.12 at 4K. Google lists the same model at $0.134 and $0.24, so that is 55% and 50% below list. Our $0.06 is also lower than Google's own Batch API price of $0.067 — and Batch makes you queue, while we return in real time. • Nano Banana 2 (gemini-3.1-flash-image-preview) — $0.05 at 1K and 2K, $0.08 at 4K, against Google's $0.067 / $0.101 / $0.151. That is 25% off at 1K, 50% off at 2K and 47% off at 4K. • GPT Image 2 (gpt-image-2) — a flat $0.025 per 1K image, $0.04 at 2K, $0.06 at 4K, with up to 16 reference images for multi-image editing. OpenAI bills this model by token; we bill a fixed price per image, and no OpenAI organization verification is required. The API is OpenAI-compatible, so existing SDKs, Cursor, Codex and LangChain code work by pointing base_url at apimodels.app. Billing is strictly pay-as-you-go with per-call prices published on every model page, starting at $0.001; there is no subscription, no monthly minimum and no expiring credits, and failed generations are never charged. New accounts get $0.10 of free credit with no card required.
One API key for 100+ AI models — image, video, music, speech and LLM. Nano Banana Pro at $0.06/image, 55% below Google's list price. Pay-as-you-go, no subscription.
EMix.ai: Lower-Cost AI APIs for Multimodal Development
Unified lower-cost AI API platform
Emix.ai is a developer-focused AI API platform that provides unified access to leading image, video, audio, chat, and enhancement models. It lets teams build with models like GPT, Gemini, Kling, Seedance, Claude, and Grok through one lower-cost API, with transparent usage-based pricing, free API credits, and no charges for failed generations.
Modelflare
Modelflare is a stable, lower-cost API gateway for GPT, Claude, Grok, GLM, Seedance, MiniMax, and other models, with routes as low as 1.5% of the official price. The same account opens Castaly, a studio for generating images and video, comparing models and prices, and remixing community work.
Modelflare is one API gateway for apps, agents, and coding tools. Keep the client you already use, point it at https://modelflare.dev/v1, and call many model families with the same key.
Lower price. Selected routes bill down to 1.5% of the official list price. A single top-up of US$20 unlocks GPT at that 0.015x rate.
Everyday traffic can stay on a lower-cost group; more sensitive jobs can use a balanced or higher-stability group. The pricing page shows what you pay against the official list price. Balance is in US dollars: one dollar of top-up is one dollar of credit. Castaly uses that same balance.
A key can list fallback groups in order. If the primary group is unavailable, the request moves to the next group. Each request records status, latency, token usage, and cost, whether it came from your own code or from Castaly.
Many models, one account. GPT uses OpenAI Chat Completions and the Responses API, including Codex-style clients. Claude uses Anthropic Messages, including Claude Code. Grok, GLM, Seedance, and MiniMax are on the same key, along with DeepSeek, Kimi, Owen, Gemini, and image and video models.
Castaly (https://castaly.modelflare.dev) is the studio on that account.
In the browser you generate images and video with Seedance, Kling, Wan, MiniMax, Seedream, and other models from the same catalog. You compare specifications and price, set the shot parameters, and remix a community work from its prompt and settings. Account, balance, API keys, and usage history are shared with Modelflare, so a result made in Castaly can also be requested through the API.
Create a key at https://modelflare.dev, set the base URL to https://modelflare.dev/v1, or start a shot in Castaly.
Key Features AI
Core Features
One API key for 200+ connected AI models
Unified OpenAI-compatible base URL routing
Intelligent load balancing and automatic failover switching
24/7 centralized usage analytics and billing visibility
Prepaid, pay-as-you-go billing with explicit quota limits
Advantages
Reduces the overhead of managing separate accounts and SDKs for every provider
Significantly cheaper than official pricing, offering up to 40% savings on metered spend
Highly compatible with existing tools like Cherry Studio, CCCC Switch, and NewAPI protocols
No recurring monthly subscription required; balance is consumed strictly by usage
Automatic upstream account switching ensures high stability and reliability
缺点：Requires a prepaid balance to start testing real workloads
缺点：Dependent on flatkey.ai's infrastructure availability as an intermediary gateway layer
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