Compare AI tools

	Qwen A	Symphony A	Claude Code S	Perplexity S
Tagline	Alibaba's open chat model. Multilingual + agentic.	OpenAI's open-source daemon that turns your Linear board into an always-on coding agent factory — tickets go in, pull requests come out.	Anthropic's CLI agent. Opus-powered, operates on your repo directly.	AI search done right. Cited answers, not chat theater.
Category	Chatbots	Agents	Coding	Research
Pricing	Free web + API	Free (open-source)	Part of Claude Pro/Max/Team plans	Free + $20/mo Pro
Best for	Vietnamese/Chinese content, SEA multilingual use, developers wanting open-weight tool-use.	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 an agent, not autocomplete. Large refactors, tests, docs.	Replacing Google for any question where you want a cited answer in seconds.
Strengths	Excellent Chinese + Vietnamese + SEA languages Strong at tool-use + agentic workflows Open weights (Qwen2.5, Qwen3)	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	Runs locally, edits your actual files Strong on large codebases with 1M context Great at multi-step tasks	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context
Weaknesses	English quality behind Claude/GPT Less well-known outside Asia	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-based — learning curve Can't be used without Claude subscription	Not a general chatbot Answers can be shallow on complex topics
Kai's verdict	A-tier. The best open model for Vietnamese + Chinese. Don't sleep on it if you work in SEA.	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.)	S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.	S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
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