Meta’s Muse Spark Open is the most capable US open-weight model yet, but Chinese open-weight models from Moonshot, Z.ai, Alibaba and Xiaomi still lead on coding and the overall index. We compare benchmarks, the Muse Model License, safety, Mac Studio hardware and price, and what it means for UK businesses.
Mistral Large 4 scored 38.4 on the Artificial Analysis Intelligence Index: sixth among the open-weight models on the launch chart, eighth on the full leaderboard and first outside China. We show every way of counting, the sub-scores against MiMo, GLM and DeepSeek, cost and time per task, and what could move it.
Mistral has released Mistral Large 4, a 1-trillion-parameter open-weight model with 49 billion active parameters, as a preview, with weights due by the end of October. We cover the specs, the sovereign AI pitch, the cyber defence claims, independent rankings, price per task, self-hosting memory and the licence question.
OpenAI’s GPT-6.1 Sol reached AIxploria about 14 hours after DevDay, badged #4 in LLM models. We checked 24 claims on the card against OpenAI’s docs, system card, Artificial Analysis, OpenRouter and GitHub. Twenty-one hold up; a Terminal-Bench claim, a safety summary and the Freemium tag do not, and the card omits cache-write costs and latency.
ElevenLabs launched Eleven v4 and the low-latency Eleven v4 Turbo on 28 September 2026, and Artificial Analysis ranked Eleven v4 first on its Provider Voice arena within half an hour. We read the leaderboard and its confidence intervals, separate independent results from ElevenLabs’ own tests, convert per-character prices into cost per hour of speech and set out which businesses should switch.
AIxploria added Xiaomi’s MiMo-V2.6 at 03:48 UTC on 28 September 2026, six and a half days after the weights reached Hugging Face. The card’s review is mostly accurate, but it misses Xiaomi’s 27 September admission that the models sometimes looped on tool calls, and the fixed models it swapped into the API on 25 September under the same names. We checked 20 claims, the independent Intelligence Index, Xiaomi’s benchmarks, prices and the card’s #28 badge.
AIxploria published its Claude Opus 5.5 card at 03:23 UTC on 24 September 2026, about 35 hours after Anthropic’s launch. We checked 14 of its claims against Anthropic’s launch post, model overview and pricing page: nine are fully correct, but the card contradicts itself on the 1M-token context window, labels a paid model Freemium, misstates the launch gap with GPT-6 Sol, drops the benchmarks GPT-6 Astra wins, and carries a “#4 in LLM models” badge for a slot Grok 4.6 already holds. Here is what the card gets right, what it gets wrong and what the price cut really means.
AIxploria listed MAI-Transcribe-2 at 04:12 UTC on 14 September 2026 with a 4.4 rating from five votes, a Free tag and a badge reading “#25 in Transcriber”. We tested the badge against the directory’s own category pages, checked 30 items on the card against Microsoft’s launch post, model page, Azure documentation and the Artificial Analysis leaderboard, and measured where the card appears. Sixteen items match, but the #25 slot belongs to Whisper Large V3 Turbo, the Free tag contradicts the card’s own FAQ, and the review gets the diarization defaults and file limit wrong while leaving out a 15-minute ceiling.
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