Compare AI tools

	DALL-E 3 B	GitHub Copilot B	Symphony A	Aider A
Tagline	OpenAI's image model. Built into ChatGPT Plus.	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	OpenAI's open-source daemon that turns your Linear board into an always-on coding agent factory — tickets go in, pull requests come out.	Terminal-based AI pair programmer. Git-aware, model-flexible.
Category	Image	Coding	Agents	Coding
Pricing	Included with ChatGPT Plus $20/mo	Free (limited) + $10/mo Pro + $19/mo Business	Free (open-source)	Free (open source) + whatever API you use
Best for	ChatGPT Plus users who want images without paying extra.	Teams with GitHub already. Devs who don't want to change IDEs.	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.	Developers who want open-source tooling with full control.
Strengths	Excellent prompt understanding Built into ChatGPT — no extra subscription Good at composition + concepts	Great enterprise story Works in your existing IDE Chat + autocomplete	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	Works in any terminal Auto-commits changes with meaningful messages Works with any model (Claude, GPT, local) Minimal learning curve
Weaknesses	Aesthetic ceiling below Midjourney + Ideogram Text rendering worse than Ideogram No fine control	Less agentic than Cursor/Claude Code Model quality varies	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	Terminal-only Less agentic than Claude Code Setup on Windows is fiddly
Kai's verdict	B-tier standalone, A-tier value if you already pay ChatGPT. Don't pay for it separately.	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	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. The right answer if you want open-source + terminal-native + model-agnostic.
Link	Open →	Open →	Open →	Open →