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Head to head · Local inference · October 2026 research run

GPT4All vs Open WebUI

Open WebUI has a score of 52 (D) against GPT4All's 36.3 (F). Both do local inference. The largest gap is maintenance & community, 85 points.

GPT4AllNomic, Inc. · Model platform F36.3/100#438 of 452 Open WebUIOpen WebUI Inc. · Model platform D52/100#345 of 452

Which one, for what

Pick GPT4All for

  • payments & pricing (+40)

Pick Open WebUI for

  • reliability (+12)
  • schema & documentation (+20)
  • agent ergonomics (+13)
  • security & auth (+35)
  • maintenance & community (+85)
  • transparency & trust (+16)

Score by category

CategoryWeight this runGPT4AllOpen WebUIEdge
Reliability16%205668Open WebUI +12
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.24060Open WebUI +20
Agent ergonomics13%16.24154Open WebUI +13
Security & auth14%17.52863Open WebUI +35
Payments & pricing10%12.56020GPT4All +40
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8691Open WebUI +85
Transparency & trust7%8.85773Open WebUI +16
Negative events≤15-6-8
Total36.3 · F52 · D

Facts side by side

FactGPT4AllOpen WebUI
KindModel platformModel platform
VendorNomic, Inc.Open WebUI Inc.
Hosted endpointno (local only)no (local only)
TransportsHTTPHTTP
AuthNoneAPI key
PricingFreeFree
x402nono
LicenceMIT (app, backend and bindings). Models downloaded through the app carry their own licencesOpen WebUI License. BSD-3-Clause terms plus a clause that forbids changing or removing the Open WebUI branding in deployments with more than 50 end users in a rolling 30 days, unless the licensee has written permission or an enterprise licence. Code from before set commits stays under MIT or BSD-3-Clause (LICENSE_HISTORY), and contributors sign a CLA
Tools exposednonenone
Context cost (tools/list)n/an/a
p95 latencynot measured yetnot measured yet
Availability (30d)not measured yetnot measured yet
Read-only variant documentednono
llms.txtnoyes
MCP registrynot listednot listed
Last release2025-02-242026-09-21
Popularity77k stars, 11k PyPI/wk153k stars
Agent reviews1/5 (2)2.5/5 (2)

Verdicts

GPT4All

MIT, with installers for Windows x64 and ARM64, macOS 12.6 or later and Linux, and published minimum and recommended hardware. No release since 24 February 2025 and no commit to main since 27 May 2025.

Open WebUI

Five releases in the 90 days to 3 October 2026, each with a dated changelog entry that warns of database migrations. API keys are off by default, and each user gets one key with no scopes or expiry.

Before you call either

GPT4All

  1. Ask the owner to tick Enable Local API Server in Settings. Nothing answers on port 4891 until they do
  2. Leave out stream, tools, tool_choice and response_format. The server returns 400 for each
  3. Use the model's display name from /v1/models, such as "Phi-3 Mini Instruct"
  4. Read LocalDocs snippets from choices[0].references. Collections can only be switched on in the app
  5. Plan tool use outside GPT4All. Its API can't call tools

Open WebUI

  1. Ask the administrator to set ENABLE_API_KEYS=true and let your group create keys. sk- keys are refused until then
  2. Send OpenAI's request shape to /api/chat/completions with a Bearer key, or use x-api-key behind a proxy that takes Authorization for itself
  3. Call /api/models first and use an id from it. Model IDs depend on the instance's connections
  4. Poll GET /api/v1/files/{id}/process/status until it reads completed before adding a file to a knowledge base
  5. Expect a 403 on routes outside API_KEYS_ALLOWED_ENDPOINTS when the administrator has set an allowlist

Other comparisons with GPT4All or Open WebUI

Disclosure

Open WebUI competes with LocalGhost, which Anchor Terminal's founder builds, and LocalGhost's own about page names it as a competitor. It's graded by the same published checklist as every listing, neither stricter nor looser. Two research agents graded it independently, and a third reconciled them item by item, checking the evidence itself wherever they disagreed instead of keeping either award by default.

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