At max effort in Claude Code, Artificial Analysis measures Opus 5.5 at 66, above Opus 5 at 60 and Claude Fable 5.1 at 62. Its cost per task is $13.04, higher than Opus 5’s $10.79 despite lower token prices.
On the Artificial Analysis Text to Image Leaderboard, the 6B Ming-Image-0.1-Design model places 17th of 81 in UI/UX design and first among open-weight models, compared with 45th of 160 overall. It is released under the MIT license with RGBA output and was evaluated at 2K resolution using 12 inference steps.
MiMo-V2.6-Pro, Claude Opus 5.5, GPT-6 Luna, and GPT-6 Sol account for 11 new points on Artificial Analysis’s Intelligence Index versus cost-per-task Pareto frontier, across different reasoning efforts. Claude Opus 5.5 (max with fallback) scores 58 at $5.98 per task, the highest result on the index.
On Artificial Analysis’s Pronunciation Robustness benchmark, Gemini 3.8 Flash TTS scores 89.5%, ahead of Gemini 3.1 Flash TTS, SpaceXAI TTS, and Gemini 3.8 Flash-Lite TTS. Leadership on individual pronunciation categories is split among several models.
Artificial Analysis lists Gemini 3.8 Flash-Lite TTS at $22.07 per million characters. Both are above Gemini 3.1 Flash TTS and SpaceXAI TTS, and below Eleven v3.
The estimate is close to $5.86 for Opus 5 (max). Higher token use is offset by a 20% base-price cut and a further reduction in cache-read pricing to $0.20.
Artificial Analysis says GPT-6 Sol and Luna score similarly to their predecessors on its Intelligence Index at about half the cost, with the reduction driven by token prices that are roughly 50% lower.
Artificial Analysis finds no single open-weight text-to-speech model ahead on all nine new language leaderboards. Leadership is split among Higgs Audio V3 TTS, OpenAudio S1 Mini, Voxtral TTS and Breeze TTS 2.
Artificial Analysis has extended the Controlled Voice Arena with separate text-to-speech leaderboards for Japanese, Mandarin Chinese, Hindi, Spanish, German, French, Portuguese, Vietnamese, and Arabic. Rankings use native-language prompts, standardized cloned voices, and preference votes from first-language speakers.
The multilingual Controlled Voice Arena leaderboards compare text-to-speech models in 9 new languages. A language-selectable leaderboard, a public voting arena, and the benchmarking methodology are available.
No single open-weight text-to-speech model leads all nine languages in Artificial Analysis’s rankings. Higgs Audio V3 TTS, OpenAudio S1 Mini, Voxtral TTS, and Breeze TTS 2 each top the open-weight field in different languages, and each board includes only 2 to 6 open-weight models.
The Controlled Voice Arena now ranks text-to-speech models in Japanese, Mandarin Chinese, Hindi, Spanish, German, French, Portuguese, Vietnamese, and Arabic. Cartesia’s Sonic family leads eight of the nine boards, while Inworld AI’s Realtime TTS-2 ranks first in Mandarin.
Artificial Analysis reports a transcription speed factor of 88x real time for StepAudio 3 ASR, behind three faster systems, near ElevenLabs Scribe v2 and Gemini 3.5 Transcribe, and ahead of Fun-Realtime-ASR-preview.
Artificial Analysis says StepFun’s StepAudio 3 ASR is available through the StepFun API for non-streaming transcription, scoring 1.7% WER on the AA-WER Index, tied with Alibaba’s Fun-Realtime-ASR-preview and down from 4.7% for StepAudio 2.5 ASR. It transcribes at 88x real time and costs $0.40 per hour.
StepFun highlighted Artificial Analysis results putting Step 5 Preview at 44 on the Intelligence Index and $0.71 per task, with more to come on Oct 15. The evaluation describes a 600B/27B MoE flagship with first-party API access and open weights planned for October 15.