Best OpenAI Codex alternatives
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Short answer: Claude Code is the strongest OpenAI Codex alternative in our terminal / cli coding agent ranking (88/100 vs OpenAI Codex at 84/100). For a free or low-cost option, look at Amp (Sourcegraph) (Hobby free (BYOK, pay-as-you-go orbs)). Scores are preliminary, based on public info.
Claude Code
Included in Claude Pro $20/mo ($17/mo annual); Max from $100/mo (5x or 20x Pro usage; Max includes $100–$200/mo API credits); Team/Enterprise available. Claude Code on all paid plans; shared usage with chat.
Amp (Sourcegraph)
Hobby free (BYOK, pay-as-you-go orbs); Individual from $20/mo (higher tiers listed); Teams no extra charge.
Gemini CLI
Open source. Free with Google login: 1,000 requests/user/day; free Gemini API key: 250/day; Google AI Pro 1,500/day, Ultra 2,000/day; pay-as-you-go via API/Vertex.
OpenAI Codex today: OpenAI's coding agent: CLI, IDE extension, cloud tasks and desktop app. Pricing: Included in ChatGPT: Free $0, Go $8/mo, Plus $20/mo, Pro $100/$200/$500/mo (Ultrafast on Pro $500); Business $20/user/mo annual ($25 monthly, 2+ users). GPT-5.5 retired from Codex Oct 14, 2026 (API key sessions unaffected). Price checked 2026-10-15. It ranks #2 of 6 in Best terminal / CLI coding agent (84/100). Below are the tools ranked next to it, ordered by score in that use case.
| # | Alternative | What it is | Pricing | Our scores (vs OpenAI Codex) |
|---|---|---|---|---|
| 1 | Claude Code | Anthropic's coding agent; runs in terminal, IDEs, desktop and web. | Included in Claude Pro $20/mo ($17/mo annual); Max from $100/mo (5x or 20x Pro usage; Max includes $100–$200/mo API credits); Team/Enterprise available. Claude Code on all paid plans; shared usage with chat. Price checked 2026-10-15 | terminal / CLI coding agent 88 vs 84 |
| 2 | Amp (Sourcegraph) | Agentic coding tool from Sourcegraph. | Hobby free (BYOK, pay-as-you-go orbs); Individual from $20/mo (higher tiers listed); Teams no extra charge. Price checked 2026-10-14 | terminal / CLI coding agent 74 vs 84 |
| 3 | Gemini CLI | Open-source terminal agent for Gemini models. | Open source. Free with Google login: 1,000 requests/user/day; free Gemini API key: 250/day; Google AI Pro 1,500/day, Ultra 2,000/day; pay-as-you-go via API/Vertex. Price checked 2026-10-14 | terminal / CLI coding agent 73 vs 84 |
| 4 | OpenCode | Open-source terminal coding agent. | Free and open source, any provider. Optional OpenCode Zen pay-as-you-go balance (starts at $20). Price checked 2026-10-14 | terminal / CLI coding agent 72 vs 84 |
| 5 | Aider | Git-aware AI pair programmer in the terminal. | Free and open source (Apache 2.0); bring your own model API key or local model. Price checked 2026-10-14 | terminal / CLI coding agent 70 vs 84 |
| 6 | GitHub Copilot | The most widely integrated assistant: IDEs, CLI, cloud agent, PR code review. | Free (limited: 2,000 completions and 50 chat requests); Pro $10/mo ($15 in AI credits: $10 base + $5 flex); Pro+ $39/mo ($70 in credits); Max $100/mo ($200 in credits); Business $19/user/mo (1,900 credits); Enterprise $39/user/mo (3,900 credits). 1 AI credit = $0.01; completions unlimited on paid plans. Gemini 4 Argon (Oct 13, 2026) on Pro+/Max/Business/Enterprise at provider list price, not Pro. Price checked 2026-10-15 | autonomous agent to hand off tickets 80 vs 78 |
| 7 | Devin (cloud) | Cognition's autonomous cloud engineer for delegating whole tickets. | Shares Devin plans: Pro $20/mo includes Devin Cloud access; Max $200/mo; Teams $80/mo + $40/mo per full seat; Enterprise contact sales. Price checked 2026-10-14 | autonomous agent to hand off tickets 79 vs 78 |
| 8 | Google Jules | Google's asynchronous cloud coding agent. | Free: 15 tasks/day, 3 concurrent. Higher tiers (100 and 300 tasks/day) via Google AI plans; the page did not show prices. Price checked 2026-10-14 | autonomous agent to hand off tickets 70 vs 78 |
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FAQ
What is the best alternative to OpenAI Codex?
Claude Code is the strongest OpenAI Codex alternative in our terminal / cli coding agent ranking (88/100 vs OpenAI Codex at 84/100). For a free or low-cost option, look at Amp (Sourcegraph) (Hobby free (BYOK, pay-as-you-go orbs)). Scores are preliminary, based on public info.
How much does OpenAI Codex cost?
Included in ChatGPT: Free $0, Go $8/mo, Plus $20/mo, Pro $100/$200/$500/mo (Ultrafast on Pro $500); Business $20/user/mo annual ($25 monthly, 2+ users). GPT-5.5 retired from Codex Oct 14, 2026 (API key sessions unaffected). (Checked against https://developers.openai.com/codex/pricing on 2026-10-15.)
Which OpenAI Codex alternatives did you compare?
Claude Code, Amp (Sourcegraph), Gemini CLI, OpenCode, Aider, GitHub Copilot, Devin (cloud), Google Jules. Each is ranked alongside OpenAI Codex in at least one of our use cases: terminal / cli coding agent, autonomous agent to hand off tickets.
Do affiliate commissions affect this list?
No. The order comes from our scores, and affiliate status is never a scoring input.
Next steps
- OpenAI Codex: pricing, rankings and review
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- Claude Code vs OpenAI Codex
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