Week 45
Latest
JunieReleaseJunie Eco mode hands implementation to a lower-cost modelGitHub CopilotPlansGitHub Enterprise now includes Copilot for every licensed userSierraReleaseSierra launches Compliance Console for outbound agentsGitHub CopilotReleaseGitHub Copilot Fusion becomes generally availableGitHub CopilotReleaseGitHub Agentic Workflows become generally availableAmpPlatformAmp launches an Android appMicrosoft 365 CopilotReleaseLearning Agent and admin-deployed custom MCP connectors arrive in CopilotKiroPlansKiro replaces its upgrade discount with a free first month and 500 trial creditsGleanReleaseGlean release 565 adds agent import/export and an Azure Files connectorGoogle AntigravityReleaseAntigravity 2.28 adds a built-in browser and any-file attachmentsSynthesiaReleaseSynthesia launches a Localization API for dubbing videos at scaleRunwayReleaseRunway launches Runway Ads for generating and publishing ad variantsOpenCodeReleaseOpenCode 2.2 adds Desktop plugins and a refreshed desktop appOpenAI CodexReleaseGPT-6.1 Terra becomes available in Codex
Verified
ToolMarketCap

Free alternatives to OpenAI Codex

3 alternatives verifiably meet “Verified free tier”. 0 more are not verified either way.

Qualifying3
Self-hosting verified1
Free tier3
ReplacingOpenAI Codex
Entry priceNo verified price
Free tierNot verified
Open source · self-hostingYes Not verified
Changes 30d3
Switching from OpenAI Codex? Pick your reasons — price, self-hosting, open source, enterprise controls — and see which alternatives verifiably meet them.Switch from OpenAI Codex →

Free alternatives

Listed alphabetically. ToolMarketCap does not rank alternatives: each card states why it appears, with the first-party page behind every reading. Offers are shown beside the record and never change which tools appear or their order.

JunieJetBrains · Coding agents
Why it appears
  • Meets: Verified free tierYes — Junie Lite, a free AI layer with no trial or cardjunie.jetbrains.com ↗
  • Meets: Same use caseCoding agents
  • Meets: Recent verified changes2 verified changes in 30 days
Entry priceNo verified price
Free tierYes
Open sourceNot verified
Self-hostingNot verified
2 verified changes in 30 days · latest Release · 28 Oct 2026Junie Eco mode hands implementation to a lower-cost model
Compare with OpenAI Codex1 difference →Add to stack
OpenCodeAnomaly Innovations · Coding agents
Why it appears
  • Meets: Verified free tierYes — open source, with free models includedopencode.ai ↗
  • Meets: Same use caseCoding agents
  • Meets: Open sourceYes — MIT, the OpenCode agent and its source on GitHubopencode.ai ↗
  • Meets: Recent verified changes1 verified change in 30 days
Entry price$10/mo
Free tierYes
Open sourceYes
Self-hostingNot verified
1 verified change in 30 days · latest Release · 27 Oct 2026OpenCode 2.2 adds Desktop plugins and a refreshed desktop app
Compare with OpenAI Codex1 difference →Pricing · 2 plansAdd to stack
WarpWarp · Coding agents
Why it appears
  • Meets: Verified free tierYes — Free plan with the terminal, Agent CLI, and bring-your-own AIwarp.dev ↗
  • Meets: Same use caseCoding agents
  • Meets: Self-hostingYes — Enterprise: self-hosted cloud agents and workers on your infrastructurewarp.dev ↗
  • Meets: Open sourceYes — AGPL-3.0, the Warp client codebase on GitHub (UI framework crates MIT)github.com ↗warp.dev ↗
  • Meets: SSO and an enterprise planSSO: Team tier and above — SAML-based SSO on Businesswarp.dev ↗
  • Meets: Different deployment modelTerminal — OpenAI Codex: Terminal agentwarp.dev ↗warp.dev ↗github.com ↗
Entry price$20/mo
Free tierYes
Open sourceYes
Self-hostingYes
0 verified changes in 30 days · latest Platform · 7 Oct 2026Warp Factories adds Microsoft Teams and Azure DevOps support
Compare with OpenAI Codex2 differences →Pricing · 4 plansAdd to stack

Keep exploring

Switch from OpenAI Codex — by your requirements→Screen Coding agents→OpenAI Codex pricing0 plansOpenAI Codex change history11 changes
Alternatives are tools in OpenAI Codex's editorial segment or assigned as its peers. A reading is “not verified” when no first-party page states it — never assumed either way. Oldest record verified 2 Oct 2026. How alternatives work