OpenAI Codex vs Hunk (2026): Which Vibe Coding App Is Better?

Both are popular terminal coding agents. Here is how OpenAI Codex and Hunk stack up on price, strengths and weaknesses, and which one we would pick.

OpenAI Codex

OpenAI's coding agent for the terminal, IDE and cloud, included with ChatGPT plans

9.1 /10

Pricing: Free plan, paid from $8/mo

Pros

Included with ChatGPT plans you may already pay for
Open-source CLI plus cloud tasks that open pull requests
Reads AGENTS.md, the cross-tool instructions file

Cons

Fewer extension points than Claude Code (no plugin marketplace)
Usage limits depend on your ChatGPT plan

Visit OpenAI Codex ↗

Hunk

Terminal diff viewer built for reviewing multi-file changes made by AI coding agents

7.0 /10

Pricing: Open source

Pros

Purpose-built review UI for agent-generated diffs: multi-file review stream, inline agent annotations, split/unified/auto layouts, watch mode
Works as a Git pager/difftool and auto-detects Jujutsu and Sapling too, not just Git
Actively maintained (MIT, 9.3k stars, 305 forks, 876 commits) with an extension system and community Discord

Cons

Doesn't map cleanly onto any single existing app category here — it's a review/viewer tool for agent output, not an agent, editor, app-builder, or cloud agent i
No dated "last commit" was visible in the fetched page, so exact recent-activity cadence couldn't be confirmed beyond the commit count

Visit Hunk ↗

OpenAI Codex vs Hunk at a glance

	OpenAI Codex	Hunk
Editor score	9.1 / 10	7.0 / 10
Pricing model	Freemium	Open source
Starting price	$8/mo	Free
Reader upvotes	1	0
Best for	terminal, agent, openai	diff-viewer, code-review, terminal-ui
Agent Skills support	Yes	No
Subagents support	Yes	No
MCP support	Yes	No
AGENTS.md support	Yes	No
Plugins support	No	No
Hooks support	No	No
Rules support	No	No
Agent skills in this directory	58	0
Subagents & agents in this directory	43	3
MCP servers in this directory	74	0

Our pick

OpenAI Codex edges it with a score of 9.1 versus 7.0. OpenAI Codex is the better fit if you value: included with chatgpt plans you may already pay for, open-source cli plus cloud tasks that open pull requests. Choose Hunk instead if you need: purpose-built review ui for agent-generated diffs: multi-file review stream, inline agent annotations, split/unified/auto layouts, watch mode, works as a git pager/difftool and auto-detects jujutsu and sapling too, not just git.