OpenRouter

XingChen: Xing4.0 29B A4B (free)

XingChen: Xing4.0 29B A4B (free) is listed by OpenRouter with zero prompt and completion pricing.

Official access informationOfficial route documented

Provider application sources checked 2026-07-28.

No platform check is configured

A platform-owned check does not test your key, balance or regional access. Read the observation limits →

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Applying, testing and tool setup are separate tasks. You do not need to finish every step or sign in to review setup notes.

Check free-access, account and regional requirements before applying through the official path.

Send one browser-direct request. The result applies to that call and may use quota.

Review protocol compatibility, then copy a keyless config or setup notes. Testing first is optional.

Optional next steps: Compare output · Follow changes · Manage encrypted keys. None is required for setup.

Public connection values without your secret. Protocol support alone does not establish compatibility with every tool.