Compare AI tools

	Symphony A	GitHub Copilot B	Kling A	Udio A
Tagline	OpenAI's open-source daemon that turns your Linear board into an always-on coding agent factory — tickets go in, pull requests come out.	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	Kuaishou's video model. The surprise standout.	Suno's main rival. Often better on instrumental nuance.
Category	Agents	Coding	Video	Audio
Pricing	Free (open-source)	Free (limited) + $10/mo Pro + $19/mo Business	Credit-based, free trial	Free + $10-$30/mo
Best for	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.	Teams with GitHub already. Devs who don't want to change IDEs.	Anyone who wants top-tier video quality for less.	Musicians comparing AI outputs. Anyone who didn't click with Suno.
Strengths	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	Great enterprise story Works in your existing IDE Chat + autocomplete	Very strong motion + physics Often beats Runway on realism Great price	Strong instrumentals + genre fidelity Extend/remix features Good lyric understanding
Weaknesses	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	Less agentic than Cursor/Claude Code Model quality varies	UX is rough for English speakers Queue times	Same copyright gray zone as Suno Ecosystem smaller
Kai's verdict	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.)	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class.	A-tier. Genuinely different vibe from Suno — worth trying both for a month.
Link	Open →	Open →	Open →	Open →