Last updated: 2026-07-27
CometAPI is a unified AI API gateway founded in 2025 giving developers one OpenAI-compatible endpoint to 500+ models from OpenAI, Anthropic, Google, xAI, and DeepSeek. It prices popular models about 20% below official provider rates, with pay-as-you-go billing and no credit expiry. It covers text, image, video, and audio models beyond typical LLM-only gateways.
About CometAPI
CometAPI is a unified AI API gateway founded in 2025 by Sonic, a serial entrepreneur with 15+ years building technology products. It solves a concrete integration problem: instead of managing separate accounts, keys, and billing relationships with OpenAI, Anthropic, Google, xAI, DeepSeek, and dozens of other model providers, developers point a single OpenAI-compatible client at https://api.cometapi.com/v1 and switch model names to access text, image, video, music, and voice models. The platform is priced at pay-as-you-go rates roughly 20% below each provider's official price, for example Claude Sonnet 5 at $1.60 per million tokens versus the official $2.00, and FLUX 2 MAX images at $0.008 versus $0.01. Unused credit balances carry forward with no expiry, and there is no monthly subscription requirement. CometAPI advertises a 99.9% availability SLA and sub-400ms average latency across its gateway. It is built for developers and small to mid-sized engineering teams who need to prototype or run production workloads across multiple model families without renegotiating contracts with each vendor. A built-in playground lets teams benchmark the same prompt against several models before committing to one, and a Python SDK plus proxy server support load balancing and automatic fallback between providers. Pricing has three tracks: a free trial with starter credits and no credit card required, standard pay-as-you-go metered billing, and a custom Enterprise tier with volume discounts, a dedicated account manager, and custom SLAs. CometAPI runs on web only; there is no desktop or mobile client since the product is consumed as an API. The company maintains a public GitHub organization (CometAPI-dev) publishing SDK and proxy tooling, and it competes directly with OpenRouter, Together AI, LiteLLM, Portkey, and Replicate in the AI gateway space, differentiating mainly on its catalog of non-text models (image, video, music, voice) alongside LLMs.
Pricing
Free trial credits, no credit card required. After that, pure pay-as-you-go metered billing, roughly 20% below each provider's official rate (e.g. Claude Sonnet 5 at $1.60/1M tokens vs official $2.00; FLUX 2 MAX images at $0.008 vs $0.01; Vidu Q3 Turbo video at $0.028/sec). No monthly subscription or minimum spend. Unused credits never expire. Enterprise tier is custom-priced with volume discounts, a dedicated account manager, and custom SLAs.
Key Features
- 500+ model catalog: Provides one API key and one OpenAI-compatible endpoint to more than 500 models from OpenAI, Anthropic, Google, xAI, DeepSeek, Alibaba, and other providers.
- 20% below official pricing: Prices popular models roughly 20% under the provider's own list price, e.g. Claude Sonnet 5 at $1.60/1M tokens versus the official $2.00/1M.
- Multi-modal routing: Extends past text models into image (FLUX, GPT Image, Nano Banana), video (Vidu, Happy Horse), TTS, and STT endpoints behind the same key.
- Drop-in OpenAI SDK compatibility: Existing OpenAI SDK code points at https://api.cometapi.com/v1 with a model-name swap and no other code changes.
- Load balancing and fallback: Python SDK and proxy server support automatic fallback and load balancing across providers to reduce single-vendor outage risk.
- Non-expiring credit balance: Unused prepaid credits roll forward indefinitely with no expiration date, unlike many competitor gateways.
- Built-in benchmarking playground: Lets teams run the same prompt against multiple models side by side before committing a workload to one provider.
Pros
- Roughly 20-40% cheaper than calling providers directly, verified against Claude Sonnet 5, FLUX 2 MAX, and GPT Image 2 list prices.
- Catalog spans text, image, video, and audio models (500+ total) versus text-only routing on many competing gateways.
- Non-expiring credit balance and no monthly subscription removes the use-it-or-lose-it pressure common on competitor plans.
Cons
- No publicly documented SOC 2, GDPR, or HIPAA attestations as of mid-2026, which rules it out for regulated enterprise workloads without further vendor due diligence.
- Founded in 2025, so it lacks the multi-year uptime track record and third-party review volume of OpenRouter or Together AI.
- Feature parity across providers is uneven; streaming behavior, tool-calling formats, and multimodal payload quirks can differ by underlying model.
Frequently Asked Questions
What is CometAPI and what does it do?
CometAPI is a unified AI API gateway founded in 2025 that gives developers one API key and one OpenAI-compatible endpoint to reach more than 500 AI models. Instead of managing separate accounts with OpenAI, Anthropic, Google, xAI, and DeepSeek, a developer sends requests to https://api.cometapi.com/v1 and selects the model by name. It covers text generation, image creation, video production, and voice models on the same billing account. The platform was founded by Sonic, a serial entrepreneur with 15+ years of technology experience. It targets developers and small engineering teams who want to avoid vendor lock-in and simplify multi-model billing. CometAPI advertises a 99.9% availability SLA and sub-400ms average routing latency.
How much does CometAPI cost in 2026?
CometAPI uses pure pay-as-you-go billing with no monthly subscription or minimum spend. New users get free trial credits with no credit card required to start. After that, pricing is metered per model: text models bill per token (e.g. Claude Sonnet 5 at $1.60 per million tokens versus the official $2.00), image models bill per image (e.g. FLUX 2 MAX at $0.008 versus $0.01 official), and video models bill per second (e.g. Vidu Q3 Turbo at $0.028 per second). Prices are set roughly 20% below each provider's official rate. Unused credit balances never expire and roll forward indefinitely. An Enterprise tier adds custom pricing, volume discounts, a dedicated account manager, and custom SLAs.
What are the main features of CometAPI?
The core feature is unified access to 500+ models from OpenAI, Anthropic, Google, xAI, DeepSeek, and other providers behind one API key. It offers drop-in OpenAI SDK compatibility, so existing code needs only a base URL and model-name change to run. A Python SDK and proxy server add load balancing and automatic fallback across providers to reduce single-vendor outage risk. A built-in playground lets teams benchmark the same prompt against multiple models before committing a production workload. It also extends beyond LLMs into image, video, TTS, and STT models, which is broader than most text-only gateways. Usage analytics track spend, latency, and call volume with budget alerts.
Is CometAPI free to use?
CometAPI offers free trial credits when a new account signs up, with no credit card required to get started. Beyond that trial balance, there is no ongoing free tier; usage is billed pay-as-you-go per token, per image, or per second depending on the model called. There is no monthly subscription fee at any tier below Enterprise, so light users only pay for what they consume. Unused credits carry forward indefinitely rather than expiring at the end of a billing cycle. Heavier or production usage requires purchasing additional prepaid credit.
What are the best alternatives to CometAPI?
OpenRouter is the closest direct competitor, offering pass-through pricing with exact parity to provider costs plus a small platform fee, and is a better fit if you only need LLM routing. Together AI is a stronger choice for teams that need dedicated GPU endpoints, batch inference, or fine-tuning infrastructure rather than simple API routing. Replicate suits teams that want to run a specific open-source model checkpoint directly rather than route across proprietary hosted APIs. LiteLLM is the best option for teams that want a self-hosted, open-source gateway instead of a managed third-party service. Portkey is a stronger pick for teams prioritizing production observability and compliance tooling over raw model breadth.
Who is CometAPI best for?
CometAPI is best for backend and platform engineers building products that call multiple AI model providers and want one bill and one integration point. It suits startups that want to A/B test GPT, Claude, and Gemini models against the same prompt without separate vendor contracts. Solo developers and small SaaS teams benefit most from the roughly 20% pricing discount and non-expiring credits. It is not the right fit for regulated enterprises (healthcare, finance) that require documented SOC 2 or HIPAA attestations, since none are publicly published as of mid-2026. It is also a weaker fit for teams that need guaranteed identical tool-calling behavior across every routed model, since provider quirks can leak through the gateway.
Does CometAPI have an API?
Yes, the API is the entire product: a single OpenAI-compatible endpoint at https://api.cometapi.com/v1 that accepts the same request format as the OpenAI SDK. Developers change the base URL and the model name to route a call to any of the 500+ supported models. A Python SDK and proxy server are published on the CometAPI-dev GitHub organization, supporting load balancing and automatic fallback. There is a Dify marketplace plugin for no-code workflow builders. As of mid-2026, there is no dedicated first-party MCP (Model Context Protocol) server published by CometAPI itself, though generic MCP wrappers via third parties like Zapier can proxy calls through it.
How does CometAPI compare to OpenRouter in 2026?
CometAPI's catalog extends beyond LLMs into specialized image and audio models like Midjourney-style image generation and Suno-style music generation, while OpenRouter focuses primarily on text-based and reasoning-enabled LLMs. On pricing, CometAPI advertises roughly 20% savings below official provider rates on models like Claude Opus 4.7, while OpenRouter runs a pass-through model that charges close to exact provider cost plus a minimal platform fee. OpenRouter's smart routing automatically shifts requests to healthy providers during outages, while CometAPI emphasizes serverless architecture for high concurrency and global distribution. Choose OpenRouter if you want pricing parity and mature outage failover on text models; choose CometAPI if you want one account covering text, image, video, and voice generation with a built-in discount.
Top Alternatives
- OpenRouter: Pick CometAPI if you need image, video, and voice models alongside LLMs; pick OpenRouter for pass-through pricing parity on text-only routing.
- Together AI: Pick CometAPI for lightweight multi-model API access; pick Together AI when you need dedicated GPU endpoints or fine-tuning infrastructure.
- Replicate: Pick CometAPI for unified OpenAI-compatible billing across 500+ hosted models; pick Replicate when you need to run a specific open-source model checkpoint directly.