Compare AI tools

	DeepInfra A	Grammarly A	GitHub Copilot B	Lex A
Tagline	Blazing-fast, pay-as-you-go inference API for open-source LLMs and multimodal models, now plugged directly into the Hugging Face ecosystem.	Grammar check + tone + AI drafting, everywhere you type.	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	Google Docs with an AI collaborator baked in.
Category	Dev Platform	Writing	Coding	Writing
Pricing	Free $5 credit on signup, then pay-as-you-go from $0.06/M tokens	Free + $12-$15/mo Premium + team plans	Free (limited) + $10/mo Pro + $19/mo Business	Free + $12/mo
Best for	Backend developers and ML engineers who want the cheapest reliable inference for open-weight LLMs in production, especially those already living inside the Hugging Face ecosystem.	Non-native English writers, business email, anyone who types a lot.	Teams with GitHub already. Devs who don't want to change IDEs.	Essays, long-form drafts, thinking on the page.
Strengths	Among the cheapest per-token rates for open-source models — consistently undercuts Together AI and Fireworks on small models OpenAI-compatible API means zero migration headache from existing stacks Now a first-class Hugging Face Inference Provider, so HF-native workflows (SDKs, Playground, agent harnesses) get DeepInfra with a one-line swap Runs on H100/A100 and NVIDIA Blackwell GPUs with auto-scaling and 99.982% uptime SLA on dedicated tier Supports LoRA adapter deployments and private custom model hosting, not just public models	Works in every browser/app Now has generative AI (GrammarlyGO) Tone detection + suggestions	Great enterprise story Works in your existing IDE Chat + autocomplete	Clean writing UX — distraction-free +++ prompt triggers AI help Collaboration + AI feedback together
Weaknesses	Primarily developer/API-first — no meaningful consumer-facing product or chat UI to speak of Model breadth (77 tracked) lags behind aggregators like OpenRouter or Replicate for niche or newly-released models No free tier beyond the $5 signup credit; requires a card or prepayment to continue	Can feel naggy Premium features gate basics Privacy concerns (reads your writing)	Less agentic than Cursor/Claude Code Model quality varies	Less feature-rich than Google Docs AI ceiling below dedicated tools
Kai's verdict	DeepInfra is the quiet workhorse of the inference API space — serious price performance on H100s, a genuinely clean OpenAI-compatible API, and now a native HF provider makes it a strong default choice for any team running open-source models at scale. (Verdict pending Phi's full review.)	A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.
Link	Open →	Open →	Open →	Open →