AIFast Model Check

What is AIFast Model Check?

AIFast Model Check, also called the LLM API Gateway Check, is a browser tool from AIFast HK for people who buy model access through third-party relay endpoints. You enter a public HTTPS base URL, a temporary API key and a model ID, then choose a fast run of about 3 requests or a standard run of about 7. The tool screens authentication and the model list, protocol compliance, instruction following, visible metadata, token usage fields, random dynamic questions, streaming (SSE) and tool-call behavior. The report lists why each check passed, failed or stayed inconclusive instead of giving a single unexplained score, and it records the requested model next to the one returned. The vendor is clear that one black-box test cannot prove which model sits behind a gateway; the score measures API compatibility, not authenticity. It says the key is not stored in a database or cache. The vendor lists no fee for the checker, though each run spends a small amount of token quota on the endpoint tested.

Use cases

• Check a relay API for model substitution
• Compare several API gateways with one test
• Verify token usage fields are consistent
• Test streaming and tool-call support
• Screen an endpoint before funding production use
• Keep evidence for a dispute with a provider

Who it's for

• Developers
• AI engineers
• API buyers
• Platform teams

Why use AIFast Model Check

• Gives itemized evidence you can save and compare over time, rather than a single score without explanation.
• Helps spot obvious problems such as mismatched model names, missing token fields or failing streaming before you commit budget.
• Runs in the browser with no download, using a temporary capped key that you can revoke afterwards.
• The guidance repeatedly warns against over-reading one result, which reduces false positives.
• Fast and standard modes let you trade speed for depth.

AIFast Model Check features

• Fast mode of about 3 requests and standard mode of about 7
• Checks authentication and the /models list
• Chat Completions protocol compliance check
• Instruction-following test with a server-side random string
• Comparison of requested and returned model fields and metadata
• Token usage arithmetic and completeness check
• SSE streaming and tool-call signal checks
• Itemized pass, inconclusive, fail and observation results
• Works with GPT, Claude, Gemini and DeepSeek compatible endpoints

AIFast Model Check integrations

• OpenAI-compatible APIs
• GPT
• Claude
• Gemini
• DeepSeek

How to get started with AIFast Model Check

1. Enter the public HTTPS base URL of the gateway up to the version path, for example ending in /v1.
2. Paste a temporary, quota-limited API key and the exact model ID from the provider's console.
3. Choose fast or standard mode and run the check; standard adds streaming, tool calls and style sampling.
4. Read the itemized report, save the evidence, and repeat the test at different times before drawing conclusions.

AIFast Model Check limitations

• A single black-box test cannot prove which model is behind a gateway
• The score reflects API compatibility, not model intelligence or vendor certification
• Only public HTTPS OpenAI-compatible endpoints are supported
• Each run uses a small amount of upstream request and token fee
• The report samples Chat Completions only, not the full Responses or Anthropic Messages protocols

AIFast Model Check pricing

AIFast Model Check is free to use.

Prices can change and may vary by country or exclude tax. Check the official pricing page.

AIFast Model Check alternatives

The main AIFast Model Check alternatives listed on Debuly are Opik, Price Per Token, Ragas, ValueRay, Blackbox AI and Agent Development Kit (ADK). The table compares pricing and platforms; order is A–Z.

1. 

   Agent Development Kit (ADK)

   Google's open-source, code-first Python framework for building, testing and deploying AI agents and multi-agent workflows.

   Developer platformsAutomation and agentsCoding
   Open sourceVisit Agent Development Kit (ADK) (official site)
2. 

   Blackbox AI

   Inference platform with one OpenAI-compatible endpoint for 300+ open and closed models, encrypted connections, and dedicated enterprise deployments.

   Developer platformsCodingAutomation and agents
   Contact salesVisit Blackbox AI (official site)
3. 

   Opik

   Comet's open-source platform for tracing, evaluating and monitoring LLM applications and agents, self-hosted or in the cloud.

   Developer platformsAutomation and agentsCoding
   FreemiumVisit Opik (official site)
4. 

   Price Per Token

   Website that compares LLM API token prices, context windows and benchmarks across 300+ models from many providers.

   Developer platformsResearch and search
   FreeVisit Price Per Token (official site)
5. 

   Ragas

   Open-source Python library for evaluating LLM and RAG applications with metrics, experiments and synthetic test data generation.

   Developer platformsCodingResearch and search
   Open sourceVisit Ragas (official site)
6. 

   ValueRay

   Stock and ETF research data with peer rankings and market regime, served by REST API and MCP so AI assistants can analyze symbols.

   Developer platformsResearch and searchAutomation and agents
   FreemiumVisit ValueRay (official site)

AIFast Model Check FAQ

Sources & verification

Facts on this page come from the official sources below, each with the date we read it. Written by Debuly; the vendor did not review this page.

Image credits

• Logo: from docs.aifast.hk · fetched 23 Oct 2026 · Vendor trademark, used only to identify the product; removed on request
• Cover: none collected yet, so a generated tile is shown.

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