Compare AI tools

	Kling A	Replicate S	Symphony A	Ideogram S
Tagline	Kuaishou's video model. The surprise standout.	Run any open-source AI model with an API call.	OpenAI's open-source daemon that turns your Linear board into an always-on coding agent factory — tickets go in, pull requests come out.	The one that actually gets text in images right.
Category	Video	Dev Platform	Agents	Image
Pricing	Credit-based, free trial	Pay per second of compute	Free (open-source)	Free + $8/mo + $20/mo + $60/mo
Best for	Anyone who wants top-tier video quality for less.	Developers using open-source models (Flux, SDXL, Whisper, etc).	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.	Anything with text — posters, ads, album covers, slide decks.
Strengths	Very strong motion + physics Often beats Runway on realism Great price	Tens of thousands of models (image, video, audio, LLMs) One-line API for any model Cog framework for custom model deploy	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	Best text rendering in the game Strong free tier Good for logos, posters, thumbnails
Weaknesses	UX is rough for English speakers Queue times	Cold starts on less-popular models Pricing gets real at scale	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	Aesthetic ceiling below Midjourney Less style variety
Kai's verdict	A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class.	S-tier for open-source model APIs. The default in this space.	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 for text-in-image. Use this for posters, Midjourney for art.
Link	Open →	Open →	Open →	Open →