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.
The 0.87.1 release updates Pi’s library to use the latest models, with the release published on pi.dev.
Expedia says it is joining Muse. Soon, a personal AI agent told a destination will be able to work with Expedia to sort hotels and everything in between.
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.
Pydantic says the agents use TypeSafe AI’s Jev classifier to answer typed questions, returning each agent’s existing output model with one confidence score per field.
Expedia says a personal AI agent on Muse will soon be able to take a destination and work with Expedia to arrange hotels and other parts of a trip.
OpenCode now offers GPT 6 Sol, Luna and Opus 5.5. No pricing, limits, or eligibility conditions are stated.
OpenAI’s two models can be tested on Arena, where votes on real-world agentic tasks feed the leaderboard. Arena.ai says petergostev has also compared GPT-6 Sol with GPT-5.6 Sol using the same prompts at max reasoning.
Pi says the three models are available on Radius at radius.earendil.com.
GPT-6 Sol can be used in Perplexity and Computer, where it is the default Light option in the effort selector.
Claude says Claude Opus 5.5 is available today. The statement was posted at 18:55 UTC on September 22, 2026, and gives no platform, price, quota, or eligibility terms.
On Arena.ai, both models can be tried in Battle Mode and Agent Mode.
OpenAI’s GPT-6 Sol and GPT-6 Luna can now be tested in Arena.ai’s Agent Arena, with scores still to come, and in Code Arena for WebDev, Text, Vision, Search, and Document. OpenAI says the models build on GPT-6 Astra and that their API prices are 50% lower than GPT-5.6 promotional pricing.
GitHub Copilot now generally offers two additional OpenAIDevs GPT-6 models: GPT-6 Sol for interactive and agentic coding, and GPT-6 Luna, which GitHub calls a lightweight, lowest-cost option for smaller tasks.
DAIR.AI describes PrimeScientist, which uses an adaptive MCTS policy to choose where a research agent spends its budget. On 12 AI research tasks under the same budget, it reports 10.3% more reward and 50.6% fewer research attempts than AutoResearch.
Sam Altman says GPT-6 Sol and Luna are big improvements over 5.6-family predecessors in intelligence, alignment, work output, coding and computer use, at half the price per token and even less per task. He says that on per-task pricing he does not think anything in the market is competitive.
According to Polymarket, OpenAI claims task costs are up to 93% cheaper than Claude Opus 5 in some coding evaluations.
He says both models are big improvements over their 5.6-family predecessors in intelligence, alignment, work output, coding, and computer use, and that they cost even less per task.
Command Code now offers Claude Opus 5.5 in Command Code Max and through its API. No pricing, quota, or other access conditions were stated.
