Day 7 · 2026-10-30
15 launches checked60 claims quoted word for word87 user reports linked10 verified fixes linked6 corrections publishedLive 7 days5 of 5 founding sponsor spots left
Day 7Launch day vs. day 7
AI launches, checked against real usersLast re-stamped 30 Oct 2026

AI models / Compare

Claude Opus 5.5 vs Gemini 4 Argon: which delivered after 7 days?

Same stamp after day 7: both Claude Opus 5.5 and Gemini 4 Argon are stamped Partly. The claim tallies below show where each one held and where it didn't.

Claude Opus 5.5Gemini 4 Argon
VerdictPartlyPartly
Claims held00
Claims mixed32
Claims failed01
Claims unclear21
User reports710
Launched22 Sept 202613 Oct 2026
Last stamped22 Oct 202622 Oct 2026

No. 002 · Anthropic

Claude Opus 5.5

PartlyDay 7 verdict

The lower list price is real, but users report limits draining faster, more thinking tokens and safeguard false alarms, and nobody has independently confirmed the 40% saving.

Launched
22 Sept 2026
Stamped
22 Oct 2026
Claims
✓0 held · ~3 mixed · ✗0 failed · ?2 unclear
Reports
7 (1 praise · 6 problem · 0 mixed)

What they claimed

“It performs at the level of Claude Fable 5.1 on most work and costs 40% less to run than Opus 5.”
~ Mixed
“Input and output tokens are $4 and $20 per million, 20% less than Opus 5.”
? Unclear
“In addition to the price drop, we’re increasing five-hour usage limits on Pro, Max, Team, and seat-based Enterprise plans.”
~ Mixed
“It is much less likely than recent models to take hard-to-reverse actions or act outside the boundaries it’s been given”
~ Mixed
“Opus 5.5 also generates output more than 30% faster than Opus 5.”
? Unclear

Full receipt

No. 005 · Google

Gemini 4 Argon

PartlyDay 7 verdict

It is live in the API and Gemini app, but the advertised 95% cache discount gave users zero cache hits, and many Pro and Business subscribers still can't use it in Antigravity.

Launched
13 Oct 2026
Stamped
22 Oct 2026
Claims
✓0 held · ~2 mixed · ✗1 failed · ?1 unclear
Reports
10 (1 praise · 8 problem · 1 mixed)

What they claimed

“Gemini 4 Argon is now globally available today for developers and enterprises via the API in AI Studio and Gemini platform, for Google AI Ultra subscribers in Google Antigravity, and Google AI Ultra and Pro subscribers in the Gemini app and AI Mode in Search.”
~ Mixed
“Today, we’re rolling out Gemini 4 Argon directly inside Google Antigravity for Google AI Pro and Ultra subscribers — available in the Antigravity desktop app and the Antigravity CLI.”
~ Mixed
“The model launches today at an introductory price of $2 per million input tokens and $10 per million output tokens (with cached input tokens at 95% off).”
✗ Fails
“Its depth and precision across multi-step tasks leads Argon to outperform other frontier models on benchmarks across domains, ranking #1 on the Vals Index”
? Unclear

Full receipt

Both stamps come from the public user reports linked on each receipt, under the same method. Verdicts are opinion and are never paid for.

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