OpenAI's flagship chat assistant — the broadest, most-used AI product on earth.
Lex alternatives
8 alternatives to Lex, ranked by category fit, capability overlap and pricing. Click any entry to see a head-to-head comparison with Lex.
- ChatGPTGPT-5✍️Writing & chatFreemium · from $20chatreasoningvisionvoice
- ClaudeSonnet 4.6
Anthropic's chat assistant — preferred by developers and writers for its tone and reasoning.
✍️Writing & chatFreemium · from $20chatreasoningvisionartifacts - Gemini2.5 Pro
Google's chat assistant with 1M+ token context and tight Workspace integration.
✍️Writing & chatFreemium · from $20chatreasoningvisionvoice Real-time writing assistant — grammar, tone, brand voice, available in every app.
✍️Writing & chatFreemium · from $12grammartone-detectionrewritingbrand-voice- Wordtunev3
AI rewriting assistant — instantly rephrase sentences to be clearer, shorter, more casual.
✍️Writing & chatFreemium · from $10rewriteparaphraseshortentone Compare GPT-5, Gemini 2.5, Claude 4, DeepSeek R1 and Llama side-by-side.
✍️Writing & chatFreemiumllm-comparisonmulti-modelside-by-sidexAI's conversational LLM with a real-time view of X and a less-filtered tone.
✍️Writing & chatFreemium · from $30chatreal-timex-integrationAnalyze, score and optimize AI prompts for any model.
✍️Writing & chatFreemiumprompt-engineeringprompt-analysis
Looking for more? Browse all writing & chat tools · See the curated index