Decision workspace

Anthropic vs OpenAI: source-backed comparison

A side-by-side view of attributable activity, calibrated scores, open-source signals, and market overlap for Anthropic vs OpenAI.

As of , AIIStack tracks Anthropic at 83.57/100 and OpenAI at 72.14/100 on Momentum.

Explore leaders
No paid placement or self-reported rankings. A missing value means AIIStack does not yet have enough attributable evidence to show it fairly.

Company

AN
Anthropic

anthropic.com

Foundation models
Open profile
OP
OpenAI

openai.com

Foundation models
Open profile

Signals

Cohort scores

Momentum

Freshness + release velocity

Momentum score for Anthropic
83.57/100-5.72 pts

95% confidence · Current cohort score

Momentum score for OpenAI
72.14/100+0 pts

95% confidence · Current cohort score

Innovation

Release cadence + freshness

Innovation score for Anthropic
83.57/100-5.72 pts

95% confidence · Current cohort score

Innovation score for OpenAI
72.14/100+0 pts

95% confidence · Current cohort score

Popularity

Open-source adoption

Popularity score for Anthropic
55/100+0 pts

93% confidence · Current cohort score

Popularity score for OpenAI
77.86/100+0 pts

93% confidence · Current cohort score

Visibility

Versioned prompt-panel evidence

Visibility score for Anthropic
Not scored
Visibility score for OpenAI
Not scored

Evidence

Operating signals

GitHub activity
anthropics/anthropic-sdk-python

3,773 stars · 787 forks · 356 open issues

openai/openai-python

31,224 stars · 4,990 forks · 600 open issues

Latest material change
pricing changed

Pricing page changed: Team · Enterprise · Free · $0

84% confidence ·

profile updated

Changelog | OpenAI API changed

70% confidence ·

Pricing posture
Pricing posture for Anthropic
Pricing Individual Team & Enterprise API Active Free Try Claude $0 Free for everyone Try Claude Try Claude Try Claude Chat on web, iOS, Android, and on your desktop Generate code and visualize data Write, edit, and create content Ability to search the web Mem… $20 if billed monthly. Try Claude Try Claude Try Claude Everything in Free, plus: More usage* Includes Claude Code Includes Claude Cowork Includes Claude Design Includes Claude Science Access to unlimited projects to organize chats and documents Access to Research Ability to use mo… Compare features across plans Search Free Try Claude Try Claude Try Claude Pro Try Claude Try Claude Try Claude Max 5x Try Claude Try Claude Try Claude Max 20x Try Claude Try Claude Try Claude Features and capabilities Features Free Pro Max 5x Max 20x Chat on… $25 if billed monthly. Premium seat 5x more usage than standard seats* $100 Per seat / month …
Pricing posture for OpenAI
Not verified
Markets
Foundation models
Foundation models

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