I gave Claude Opus 5 and Kimi K3 15 impossible prompts — the winner surprised me
AI Claude I gave Claude Opus 5 and Kimi K3 15 impossible prompts — the winner surprised me Face Off By Amanda Caswell Published 29 July 2026 The new Chinese model takes on Anthropic's latest release When you purchase through links on our site, we may earn an affiliate commission. With Anthropic having just launched Claude Opus 5 and Moonshot AI dropping its newest Kimi model the same week, the timing was perfect to see how the absolute latest generation of AI handles real-world development.I ran 15 grueling, highly technical prompts against these two brand-new heavyweight engines. From orchestrating multi-agent TDD loops to architecting secure browser extensions, the goal was to test their analytical limits right out of the gate.
- ▪AI Claude I gave Claude Opus 5 and Kimi K3 15 impossible prompts — the winner surprised me Face Off By Amanda Caswell Published 29 July 2026 The new Chinese model takes on Anthropic's latest release When you purchase through links on our si
- ▪With Anthropic having just launched Claude Opus 5 and Moonshot AI dropping its newest Kimi model the same week, the timing was perfect to see how the absolute latest generation of AI handles real-world development.I ran 15 grueling, highly
- ▪From orchestrating multi-agent TDD loops to architecting secure browser extensions, the goal was to test their analytical limits right out of the gate.
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Record
| Original publisher | Tom's Guide |
| Canonical URL | https://www.tomsguide.com/ai/i-gave-claude-opus-5-and-kimi-k3-15-impossible-prompts-the-winner-surprised-me |
| Publication time | Wed, 29 Jul 2026 05:00:00 +0000 |
| Retrieval time | 2026-07-29T05:06:36.286Z |
| Last seen | 2026-07-29T05:06:36.286Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | sEbCW-1dWq7n · 1 stories |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
AI Claude I gave Claude Opus 5 and Kimi K3 15 impossible prompts — the winner surprised me Face Off By Amanda Caswell Published 29 July 2026 The new Chinese model takes on Anthropic's latest release When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. (Image credit: Future) Copy link Facebook X Reddit Email Share this article 0 Join the conversation Follow us Add us as a preferred source on Google Newsletter Subscribe to our newsletter When you push frontier models past standard coding tests and into the reality of enterprise workflows, their true capabilities and quirks show.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Tom's Guide.
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