Compare AI tools

	Claude Code S	Symphony A	ChatGPT Operator B	Hume AI A
Tagline	Anthropic's CLI agent. Opus-powered, operates on your repo directly.	OpenAI's open-source daemon that turns your Linear board into an always-on coding agent factory — tickets go in, pull requests come out.	OpenAI's browser agent. Clicks and types on websites for you.	Voice AI that reads + expresses emotion.
Category	Coding	Agents	Agents	Voice
Pricing	Part of Claude Pro/Max/Team plans	Free (open-source)	Included with ChatGPT Pro $200/mo	Free tier + pay-as-you-go
Best for	Developers who want an agent, not autocomplete. Large refactors, tests, docs.	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.	Power users willing to pay $200/mo for a browser bot.	Therapy apps, customer service, any voice agent where emotion matters.
Strengths	Runs locally, edits your actual files Strong on large codebases with 1M context Great at multi-step tasks	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	Actually uses websites — fills forms, clicks, checks out Built into ChatGPT Good for repetitive web tasks	Detects + mirrors emotional tone EVI (Empathic Voice Interface) feels different Expressive voice output
Weaknesses	Terminal-based — learning curve Can't be used without Claude subscription	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	Slow vs doing it yourself Breaks on complex auth flows $200/mo gate	Niche use case Pricing ramps fast
Kai's verdict	S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.	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. Still early. Manus is more flexible for less money.	A-tier in its niche. The only one that actually gets emotion right.
Link	Open →	Open →	Open →	Open →