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Best AI LLM APIs & Models Tools

Foundation models, inference APIs, and model hosting platforms for developers building on LLMs

Foundation ModelsInference APIsModel HostingFine-TuningOpen Source ModelsRouting

Build a llm apis & models tool? This is the list AI assistants read.

These are the llm apis & models tools ChatGPT names when someone asks for a recommendation, and Claude Opus 4.8 is the one it names first. If you built one that isn't here, adding it is free — the listing publishes after review. Want it live in minutes with a Verified badge instead? That option is on the form, one-time, no subscription.

All LLM APIs & Models Tools (39)

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Mistral Medium 3 logo

Mistral Medium 3

Enterprise GPT-4o-class performance at $0.40/$2.00 per million tokens — Mistral's mid-tier powerhouse

paid
mistralllm
Mistral Saba logo

Mistral Saba

Mistral's 24B regional LLM — Arabic & South Asian languages, 150+ tok/s, self-hostable

paid
mistralarabic
Mistral NeMo logo

Mistral NeMo

Mistral × NVIDIA 12B open-weight model — 128k context, Tekken tokenizer, FP8 inference, Apache 2.0

freemium
mistralnvidia
Codestral Mamba logo

Codestral Mamba

Mistral's 7B Mamba-architecture coding model — linear-time inference, 256k context, Apache 2.0

free
mistralopen-source
Mathstral 7B logo

Mathstral 7B

Open-weight 7B math specialist from Mistral AI — STEM reasoning, MATH benchmark SOTA at release

free
mistralopen-source
Mixtral 8x22B logo

Mixtral 8x22B

Mistral's largest open-weights MoE — 141B total / 39B active, Apache 2.0

freemium
mistralmixtral
Claude Fable 5 logo

Claude Fable 5

Anthropic's most capable model — state-of-the-art coding, vision, and long-horizon tasks

paid
anthropicclaude
Understudy Labs logo

Understudy Labs

Captures traces from your production LLM work, then trains a cheaper open-weight model that beats the eval

paid
fine-tuningopen weights
Conifer logo

Conifer

Local-first least-cost inference router that keeps routine requests on your own hardware

free
inference routinglocal llm
EvoLink logo

EvoLink

One OpenAI-compatible API key for 75+ LLM, image, video, and audio models with smart routing and failover

paid
llm apimodel router
Yolo-Auto logo

Yolo-Auto

Flat-rate, unmetered OpenAI-compatible API serving Qwen3.6-35B, priced by concurrency instead of tokens

paid
llm-apiopenai-compatible
Mood Metrics API logo

Mood Metrics API

Real-time sentiment API with confidence scores, emotions and a financial mode

freemium
sentiment-analysisapi
APIMart logo

APIMart

One OpenAI-compatible key for GPT, Claude, Gemini, Sora and Flux, billed pay-as-you-go below list price

paid
llm-apiapi-gateway
Factagora logo

Factagora

Fact-verification API returning confidence-scored verdicts with cited sources, for grounding LLM output

freemium
fact-checkinghallucination
Defapi logo

Defapi

Credit-based gateway to image, video, text and music models from multiple vendors, from a $5 top-up

paid
llm-apimodel-gateway
LLMAPI logo

LLMAPI

OpenAI-compatible gateway to 400+ models across Anthropic, OpenAI, Google, xAI and DeepSeek with spend analytics and per-key IAM, token pools from $30/month

paid
llm-gatewayopenai-compatible
HiAPI logo

HiAPI

One API for image, video and audio models with persistent artifact links and MCP support, free API key with up to 2,000 credits then usage-based

freemium
image-generation-apivideo-generation
Compute Prices logo

Compute Prices

Daily-refreshed price index for 67 GPU providers and 26 LLM inference APIs with an agent-friendly JSON API, free key at 750 requests/day

freemium
gpu-pricingllm-pricing
Supavec logo

Supavec

Open-source RAG-as-a-service API built on Supabase row-level security — upload documents, query for cited context, self-host if you want

freemium
open-sourcerag
Apiframe logo

Apiframe

One credit-based API and MCP endpoint for Midjourney and 70+ other generative media models, with webhooks, a Studio UI and no per-seat fees

paid
apimidjourney
Semarize logo

Semarize

Conversational intelligence as an API — configurable extraction kits that return structured deal signals from call transcripts

freemium
apisales
ChatComparison.ai logo

ChatComparison.ai

Runs one prompt against 40+ models side by side with per-response cost and a routing recommendation, on one $15/mo seat

paid
model-comparisonchatgpt
DiscountedTokens logo

DiscountedTokens

Prepaid GPT-5.x API, one key, from US$5

paid
ModelRush logo

ModelRush

One OpenAI-compatible API for text, image, video, and voice models.

paid
XiuRouter logo

XiuRouter

One API for leading AI models, with selected routes saving 90%+ versus provider reference prices.

paid
Standard Compute logo

Standard Compute

Standard Compute — description pending review.

freemium
social media chat reconstruct logo

social media chat reconstruct

social media chat reconstruct — description pending review.

freemium

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