Compare AI tools

	GitHub Copilot B	ChatGPT S	Symphony A	Leonardo.ai A
Tagline	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	The default. Strongest ecosystem + best multimodal breadth.	OpenAI's open-source daemon that turns your Linear board into an always-on coding agent factory — tickets go in, pull requests come out.	Gamer + creator image gen with model fine-tuning built in.
Category	Coding	Chatbots	Agents	Image
Pricing	Free (limited) + $10/mo Pro + $19/mo Business	Free + $20/mo Plus + $200/mo Pro	Free (open-source)	Free + $12-$60/mo
Best for	Teams with GitHub already. Devs who don't want to change IDEs.	General use, voice chat, image generation, first-time AI users.	Engineering teams already using Linear + OpenAI Codex who want to stop babysitting agent sessions and instead let the issue tracker drive autonomous coding at scale.	Indie game devs, illustrators, anyone training custom style models.
Strengths	Great enterprise story Works in your existing IDE Chat + autocomplete	Great voice mode Huge plugin/custom GPT ecosystem Strong image generation (DALL-E built in) Code Interpreter	Fully autonomous ticket-to-PR pipeline: every open Linear issue gets its own isolated Codex agent without manual supervision Fault-tolerant Elixir/OTP architecture automatically restarts crashed agents and manages hundreds of concurrent runs WORKFLOW.md keeps all orchestration policy version-controlled inside the repo, so agent behavior is reproducible and reviewable like code Proven internal results: OpenAI reported a 500% increase in landed PRs on some teams within three weeks Open spec encourages community re-implementations in any language, not just Elixir	Train your own models on your style/character Great for game art + concept art Generous free tier
Weaknesses	Less agentic than Cursor/Claude Code Model quality varies	Reasoning quality varies by mode Can be verbose Confabulates on niche facts	Currently only supports Linear as an issue tracker — GitHub Issues and Jira integrations are not yet official Only OpenAI Codex is officially supported as the agent runtime; other model integrations are community-contributed and incomplete Self-hosted, Elixir-dependent engineering preview with no built-in sandboxing — not suitable for untrusted or production environments out of the box	General output behind Midjourney Can be overwhelming
Kai's verdict	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	S-tier all-rounder. If you want one tool that does everything okay-to-great, this is it.	Symphony is the most architecturally serious 'issue tracker as control plane' approach yet — 15K GitHub stars in weeks confirms the idea resonates — but it's still a rough, self-hosted engineering preview that demands Elixir chops and a Linear-only workflow. (Verdict pending Phi's full review.)	A-tier for creators training custom looks. B-tier for general use.
Link	Open →	Open →	Open →	Open →