DoubleChecks

What was claimed

New untethered jailbreak for iOS 27.0.1 has been released (Chollima Jailbreak) with tweaks, WebAssembly support, and works on iPhone 18 Pro/DUO.

Our verdict

Inaccurate

Reports say Calif has shown demonstrations but has not published a user-facing jailbreak tool. Sources explicitly state there is no public jailbreak tool or release date. The jailbreak was only demonstrated at a conference; it has not been publicly released.

Combined assessment19 sourcesChecked Oct 27, 2026

Why this verdict

  • The jailbreak has been released for users.

    Incorrect
    All assessments reached this conclusion

  • Chollima works on iPhone Duo.

    Misleading
    One assessment reached this conclusion

  • The jailbreak includes tweaks (installed apps/tweaks) and an app storefront.

    Can’t verify
    Three assessments reached this conclusion; two differed·Claude: Verified, ChatGPT: Verified

  • It works on iPhone 18 Pro and iPhone Duo.

    Verified
    Two assessments reached this conclusion; two differed·Claude: Can’t verify, ChatGPT: Misleading

Evidence reviewed

19 sources

Perplexity, Claude and ChatGPT sources are combined here.

x.comtweakers.netx.comx.comx.comx.comx.comheise.deground.newstechblog.gr

Individual assessments

Assessment summary

  • The claim is partly supported, but it incorrectly says the jailbreak has been released.
  • Reliable reports describe a demonstration of Chollima on iOS 27.0.1 and iPhone 18 Pro, while the tool has not been released for users; support for iPhone Duo is reported on iOS 27.1, not clearly iOS 27.0.1.x.com tweakers.net x.com

Claims reviewed

The jailbreak has been released for users.

Incorrect
Reports say Calif has shown demonstrations but has not published a user-facing jailbreak tool.tweakers.net techblog.gr

This claim may mislead readers without added context.

Chollima works on iPhone Duo.

Misleading
Calif demonstrated a jailbreak on iPhone Duo, but reports identify that device as running iOS 27.1 rather than iOS 27.0.1.tweakers.net techblog.gr

This claim may mislead readers without added context.

Chollima includes tweaks and WebAssembly support.

Can’t verify
A report says tweaks appeared to run, possibly through WebAssembly, but this is an observation or inference rather than confirmed release documentation.x.com

Assessment summary

  • The claim contains significant factual errors.
  • While iOS 27.0.1, the Chollima jailbreak name, and iPhone 18 Pro support are accurate, the statement falsely claims the jailbreak "has been released" when sources confirm only a demonstration occurred with no public tool available.
  • WebAssembly support is unsupported by any source, and iPhone Duo support is unconfirmed speculation.

Claims reviewed

The jailbreak has been released

Incorrect
Sources iclarified.com source unavailable explicitly state there is no public jailbreak tool or release date. The jailbreak was only demonstrated at a conference; it has not been publicly released.

This claim may mislead readers without added context.

The jailbreak has WebAssembly support

Can’t verify
No credible source mentions WebAssembly support as a feature of the Chollima jailbreak. This claim cannot be verified.

The jailbreak works on iPhone Duo

Can’t verify
Source x.com speculates iPhone Duo 'could get a day-one untethered jailbreak' but this is not confirmed. No demonstration on Duo has been reported.

Assessment summary

  • Parts of the statement describe demonstrations that did occur, but the claim that the jailbreak has been "released" is incorrect.
  • Other details (WebAssembly support, exact device coverage) are reported by observers but remain partly unverified.

Claims reviewed

A new untethered jailbreak for iOS 27.0.1 (Chollima) has been released.

Incorrect
Multiple reports show Calif.io demonstrated an untethered jailbreak on iOS 27.0.1, but there is no evidence a public release of a consumer tool named "Chollima" has been published; the demonstrators have indicated they will not release a public tool. iclarified.com redmondpie.com

This claim may mislead readers without added context.

It works on iPhone 18 Pro and iPhone Duo.

Misleading
The demo clearly showed an iPhone 18 Pro running iOS 27.0.1; some reports claim additional demonstrations or compatibility with an "iPhone Duo," but broad device support or a public compatibility list has not been published. iclarified.com nextjailbreak.com

This claim may mislead readers without added context.

The jailbreak has WebAssembly support.

Can’t verify
Observers mentioned a WebAssembly hint and discussion, but I could not find a definitive technical disclosure or authoritative confirmation that WebAssembly is fully supported in the Chollima demo. explainx.ai reddit.com

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