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Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
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Grammarly
A
DeepInfra
A
GitHub Copilot
B
Framer
A
TaglineGrammar check + tone + AI drafting, everywhere you type.Blazing-fast, pay-as-you-go inference API for open-source LLMs and multimodal models, now plugged directly into the Hugging Face ecosystem.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Design + publish sites with AI assists built in.
CategoryWritingDev PlatformCodingDesign
PricingFree + $12-$15/mo Premium + team plansFree $5 credit on signup, then pay-as-you-go from $0.06/M tokensFree (limited) + $10/mo Pro + $19/mo BusinessFree + $5-$30/mo
Best forNon-native English writers, business email, anyone who types a lot.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.Teams with GitHub already. Devs who don't want to change IDEs.Designers shipping marketing sites without engineers.
Strengths
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
  • 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
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • AI generates sections + copy + layouts
  • Designer-first publishing (not just templates)
  • Great animations
Weaknesses
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
  • 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
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Less flexible than raw code
  • Pricing per-site adds up
Kai's verdictA-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.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.)B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier for designer-led sites. S-tier if animations matter.
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