Internal research report dated **August 12, 2026** (in *What? — So What? — Now What?* format, investigation conducted August 11-12) on a simple question: are the **desktop** applications of ChatGPT and Claude better than their **web** versions? The answer comes in two parts. **(A) A solid, well-sourced qualitative consensus exists.** The starting point is indisputable: desktop and web call exactly the same cloud models, the application being merely an interface to the service — the gain therefore lies entirely in the application shell (access latency, stability during long sessions, memory footprint, system integrations, workflow fluidity). What genuinely distinguishes desktop, confirmed: on the OpenAI side, a global shortcut (Option/Alt + Space), a *companion window* that always stays on top, native screenshots, and since July 2026 the **Codex/Work** agentic capability built into the app; on the Anthropic side, **Quick Entry** (macOS), **Desktop Extensions** (installing a local **MCP** server becomes *"as simple as clicking a button"*), access to local files, **Cowork** and **Computer Use** (Accessibility permissions and screen recording). The web retains two confirmed strengths: multiple tabs/threads, and universality without a client to install. **(B) Nearly all the figures circulating to support this consensus do not withstand verification.** The report's critical audit (§1.5) classifies **unconfirmed** seven widely repeated numerical claims: the *cold start* "2-3 s vs 8-12 s" (the only trace being an anecdotal *"loads in about 3 seconds"* on Substack); RAM usage "200-700 MB vs 1.2-2 GB," attributed to an "Alibaba Product Insights" whose pages return **404**; an untraceable glitch rate and session retention figure; a "Claude +10-20% end-to-end" attributed to **Skywork**, which had in fact benchmarked its own Windows agent rather than Claude against the web; an untraceable "Cosmo Edge" source; unconfirmed Zenken AI citations; and two unauthenticated X posts with no URL. The counter-signal is documented with the same rigor: Yuri Dvoinos describes a Claude Desktop app that *"makes me want to throw my laptop out the window"* — 68% CPU usage, input lag on a MacBook Pro — and the report notes that both apps are **Electron** builds with native layers. Hence its formulation: *the desktop advantage is a promise of implementation, not a law of nature.* **The "So What"**: since the model has become the common denominator, the interface becomes the battleground — the **Codex + ChatGPT** merger of July 9, 2026 and the Cowork/Computer Use tandem tell the same story, *"the desktop app is no longer a chat client, it's an agent runtime with access to the machine."* Three consequences: the gain is a **friction** gain, not a power gain; for a CIO, desktop **shifts the trust boundary** — Computer Use requires sensitive system permissions and the Codex merger places code execution, browser, and connectors within *"one expanded trust boundary,"* whereas the browser remains governable via SSO, DLP, and CASB; and for anyone publishing, the fragility of the figures is itself the story. **The "Now What"** delivers individual switching criteria, a CIO checklist (inventory permissions, disable Computer Use and Cowork by default, scope which MCP extensions are authorized, organize distribution and updates — on Linux, outside the apt repository, Claude Desktop does not update itself) and an editorial directive: cite only confirmed verbatims and dates.
#ChatGPT Desktop#Claude Desktop#web version
**Deep Research Veille Interne** — rapport non signé · produit par une enquête sourcée menée les **11-12 août 2026** et rendu le 12.
SFEIR's engineering-cabinet analysis ("an engineer's reading") of the **July 16, 2026** launch of **Kimi K3** by the Chinese laboratory **Moonshot AI**: an **open-weights, frontier-class model** whose provider claims **~2.8 trillion parameters**, a **one-million-token context**, and **weight release before July 27, 2026** (likely under a Modified MIT license, as with the K2 lineage). Thesis: capability once thought reserved for proprietary giants (Anthropic, OpenAI, Google) is becoming available **in open weights, at a discount price, from a Chinese lab**. SFEIR — despite being an **Anthropic and Google Cloud partner**, and thus "with no interest in overselling a Chinese model" — adopts a cardinal **methodological caveat**: on launch day, **no official, complete benchmark table** exists; specs (2.8T, Kimi Delta Attention, +25% training efficiency) and scores are **vendor-stated** or drawn from **community arenas**, "to be treated as claims, not measured facts." The new architecture (**Kimi Delta Attention**, hybrid linear attention; decoding claimed up to **6.3x faster** at 1M tokens) breaks with the K2 cadence (K2 Jul. 2025 → K2.7 Code Jun. 2026, a flagship every two months); two variants accompany the launch (**K3 Max**, **K3 Swarm Max**), with forced sunsetting of the kimi-k2.5/moonshot-v1 series on **August 31, 2026**. **The real weapon is price** (~$3/M input, $0.30 cached, $15 output per secondary sources): a frontier open-weights model at this level **pulls the whole price-performance curve down** — the commoditization of the model layer, accelerated by open source. But the decisive singularity is not a score: it is **reversibility**. A frontier open-weights model turns a consumed API (vendor dependency) into an **option** (self-host, portability, exit from lock-in), at the cost of heavy infrastructure to host 2.8T parameters. SFEIR's view: **open-weights changes the question, not just the answer** — no longer "which model is best/cheapest?" but "how much of my system am I willing to make dependent on a vendor I don't control?". The right posture remains a **routed portfolio** (one model per task, one model per constraint), with Kimi K3 adding a **"reversibility" column** to the decision grid. The "AI Only" conviction stands unchanged: the model is a commodity, the durable advantage lies in the engineering around it (Context Engineering, harness, cost governance, ability to change one's mind). The figures still need validating "on your own" — your repositories, your data.
SFEIR analysis (firm's voice) of the general availability, on July 9, 2026, of **GPT-5.6** by OpenAI — not a single model but a **family of three tiers**: **Sol** (long-horizon/cyber/science flagship, the only one to unlock the "max" and "ultra" modes), **Terra** (everyday balanced tier, ~half the price of GPT-5.5), and **Luna** (fast/economical, high volume). All three share ~**1.05M tokens** of context, **128k** output tokens, and a knowledge cutoff of **February 16, 2026**. The most structuring fact is not a score but an **aggressive pricing grid** (Sol $5/$30, Terra $2.50/$15, Luna $1/$6 per million tokens): Sol keeps the previous flagship's price while being more capable, forcing the comparison onto the **capability-to-cost ratio**. Two billing subtleties (cache writes billed at **1.25×**, a surcharge beyond **272k** tokens) make the grid misleading until one has measured how much context the agent re-reads (read/write ratio ~**153:1** in agentic coding). Engineer's verdict, claimed to be neutral (SFEIR is both a **Google Cloud Premier** partner *and* an **Anthropic** partner): **no one sweeps every table** — GPT-5.6 dominates Terminal-Bench 2.1 and the Coding Agent Index (at a third of the cost per task), Claude stays ahead on SWE-Bench Pro (~15 pts); METR flagged a record **reward hacking** rate on Sol. Conclusion: "stop looking for the champion, learn to route" — the model is a commodity, the durable advantage lies in **Context/Harness Engineering**.