Best LLM APIs and model providers
Frontier model APIs, open-weight model families, local runners and inference routers: the layer every AI product is built on. Compare them on job fit, value and how portable your work stays.
Ranked by score on our 100-point rubric (how we score). Scores are initial editorial estimates from public information, not hands-on tests. Pricing is labeled verified (checked on the vendor's official pricing page, with date) or unverified. Prefer the visual version? See the LLMs & APIs tier list.
Quick picks
| # | Tool | Tier | Score |
|---|---|---|---|
| 1 | OpenAI API Frontier model API from OpenAI | S | 88 |
| 2 | Anthropic Claude API Frontier model API from Anthropic | S | 87 |
| 3 | Google AI Studio / Gemini API Gemini models via Google AI Studio | S | 87 |
| 4 | Claude Haiku 5.5 Fast, cheap small model for agent sub-tasks | S | 86 provisional |
| 5 | Ollama Run open models locally | A | 84 |
| 6 | OpenRouter One API for hundreds of models | A | 83 |
| 7 | Qwen Alibaba's open-weight model family | A | 79 |
| 8 | DeepSeek Low-cost open-weight reasoning models | A | 76 |
| 9 | Grok API (SpaceXSI / x.ai) Grok models via API | A | 75 |
| 10 | LM Studio Desktop app for local LLMs | A | 75 |
| 11 | Mistral AI European frontier and open-weight models | A | 73 |
| 12 | Groq Ultra-fast LLM inference | A | 72 |
| 13 | Together AI Inference and fine-tuning for open models | A | 71 |
The ranking
-
API for OpenAI's GPT and reasoning models, image, audio and embeddings.
- Best for
- You want the broadest model lineup and ecosystem.
- Skip it if
- You need open weights.
- Pricing
- Pay-per-token; pricing varies by model unverified editorial summary, not yet confirmed on an official pricing page
- Platforms
- API
-
API access to the Claude model family for coding, agents and long-context reasoning.
- Best for
- You build coding agents or need top reasoning and tool use.
- Skip it if
- Token cost is your main constraint.
- Pricing
- Pay-per-token; pricing varies by model unverified editorial summary, not yet confirmed on an official pricing page
- Platforms
- API
-
Access to Gemini models with long context and multimodal input; generous free tier in AI Studio.
- Best for
- You want long context, multimodal input and a strong free tier.
- Skip it if
- You need strict data residency on the free tier.
- Pricing
- Free tier; pay-per-token above limits unverified editorial summary, not yet confirmed on an official pricing page
- Platforms
- API · web
-
Anthropic's small model released Oct 7, 2026 for high-volume, cost-sensitive work like summaries, sub-agents and browser use.
- Best for
- You run many agent sub-tasks and the token bill hurts.
- Skip it if
- You need maximum reasoning depth on hard problems.
- Pricing
- Pay-per-token via the Claude API (see vendor pricing section) unverified editorial summary, not yet confirmed on an official pricing page
- Platforms
- API
-
Simple CLI and app for downloading and running open LLMs locally with an API.
- Best for
- You want private local models with one command.
- Skip it if
- You lack a capable GPU/Apple silicon.
- Pricing
- Free (local + pay-as-you-go cloud); Pro $20/mo; Max $100/mo ✓ verified on the official pricing page, Oct 18, 2026
- Platforms
- Mac · Win · Linux · CLI · API
-
Unified, OpenAI-compatible API and router for models from many providers with fallbacks.
- Best for
- You want to switch models without rewriting code.
- Skip it if
- You need direct enterprise contracts with one provider.
- Pricing
- Pay-per-token at provider prices plus a small fee; some free models unverified editorial summary, not yet confirmed on an official pricing page
- Platforms
- API
-
Wide range of open-weight LLMs, coder and vision models, plus an API via Alibaba Cloud.
- Best for
- You want strong open weights in many sizes.
- Skip it if
- You need a US-hosted vendor.
- Pricing
- Open weights free; API pay-per-token unverified editorial summary, not yet confirmed on an official pricing page
- Platforms
- API · Self-host
-
Chinese lab releasing open-weight LLMs and a very cheap API.
- Best for
- You want strong reasoning at very low cost or to self-host.
- Skip it if
- Data jurisdiction is a concern for you.
- Pricing
- Very low pay-per-token API; free chat app unverified editorial summary, not yet confirmed on an official pricing page
- Platforms
- API · web
-
API for Grok models (the x.ai site is now branded SpaceXSI), plus image, video and voice APIs; OpenAI-compatible.
- Best for
- You want Grok models in your app.
- Skip it if
- You need the largest third-party ecosystem.
- Pricing
- Pay-per-token; vendor page lists grok-4.7 from $2 per million tokens (seen Oct 18, 2026) unverified editorial summary, not yet confirmed on an official pricing page
- Platforms
- API
-
Desktop app for downloading and running local models with an OpenAI-compatible server; now also ships Bionic, an agent for documents, slides and code.
- Best for
- You want local models with a friendly GUI.
- Skip it if
- You need headless server deployments.
- Pricing
- Free to run local LLMs; optional Bionic+ cloud $20/mo; Pro $100/mo ✓ verified on the official pricing page, Oct 18, 2026
- Platforms
- Mac · Win · Linux
-
French lab offering open-weight and commercial models via API, plus Le Chat.
- Best for
- You want strong open-weight options or EU hosting.
- Skip it if
- You need the absolute top benchmark scores.
- Pricing
- Free plan; Pro $14.99/mo (excl. tax); Team $24.99/user/mo; API billed per token ✓ verified on the official pricing page, Oct 18, 2026
- Platforms
- API
-
Inference cloud on custom LPU hardware serving open models at very high tokens per second.
- Best for
- Latency matters, e.g. voice agents.
- Skip it if
- You need proprietary frontier models.
- Pricing
- Free tier; pay-per-token unverified editorial summary, not yet confirmed on an official pricing page
- Platforms
- API
-
Cloud for running and fine-tuning hundreds of open models with serverless and dedicated options.
- Best for
- You want hosted open models and fine-tuning.
- Skip it if
- You only need one proprietary model.
- Pricing
- Pay-per-token; GPU clusters available unverified editorial summary, not yet confirmed on an official pricing page
- Platforms
- API
Head-to-head comparisons
- Anthropic Claude API vs OpenAI API
- Google AI Studio / Gemini API vs OpenAI API
- Claude Haiku 5.5 vs OpenAI API
- Anthropic Claude API vs Google AI Studio / Gemini API
- Anthropic Claude API vs Claude Haiku 5.5
- Claude Haiku 5.5 vs Google AI Studio / Gemini API
FAQ
What is the best AI tool for LLM and model APIs?
OpenAI API ranks first with 88/100 (S-tier). Frontier model API from OpenAI. Use it when you want the broadest model lineup and ecosystem. Next in our ranking: Anthropic Claude API (87/100, S-tier) and Google AI Studio / Gemini API (87/100, S-tier).
Which AI tools for LLM and model APIs have a free tier?
In our pricing data, Google AI Studio / Gemini API (unverified), Ollama (verified), OpenRouter (unverified), Qwen (unverified), DeepSeek (unverified), LM Studio (verified), Mistral AI (verified) and Groq (unverified) list a free tier. "Unverified" means it is an editorial summary we have not yet confirmed on the vendor's official pricing page, so check the vendor before relying on it.
Are there open-source options for LLM and model APIs?
Yes. Ollama, Qwen, DeepSeek and Mistral AI are listed as open source or open weights. Check each project's license before commercial use.
How are these tools ranked?
Each tool is scored out of 100 on our public rubric: job fit (30), ease (15), value (15), momentum (15), openness and portability (10), trust and maturity (10) and a builder/gamer bonus (5). S-tier is 85+, A-tier 70–84, B-tier 55–69 and C-tier below 55. Current scores are initial editorial estimates from public information, not hands-on tests, and sponsors can't buy points.
Related guides
- Best frontier LLM APIs
- Best ways to run LLMs locally
- Best open-weight LLMs and model families
- Best fast LLMs for high-volume and sub-agent work
- Best LLM routers and inference providers
- LLMs & model APIs tier list
- All guides →