Prices and claims are what each story reports; a company’s own benchmark stays a company claim. The claim check compares each maker’s main claim with an independent test that our story cites. Released models so far: 6 backed, 9 mixed, 12 not checked yet.

October 2026

  1. MAI-Transcribe-2-StreamingMicrosoft AIPreviewVoiceCopy the link to this entry

    Microsoft’s first live speech-to-text model, in 60 languages, in public preview in Microsoft Foundry. Two text-to-speech models, MAI-Voice-2.1 and 2.1-Flash, came with it.

    Claim check: BackedOn Artificial Analysis’s streaming leaderboard it gets 2.5% of words wrong at the first partial transcript, the lowest of 32 models shown; the next is 3.4%.

    Price $0.54 per audio hour (introductory, until the end of 2026)

    Microsoft’s live transcription model tops an outside test

September 2026

  1. Gemini 3.8 Flash TTS and Flash-Lite TTSGoogleReleasedVoiceCopy the link to this entry

    Text-to-speech in more than 100 languages; can clone a voice from a short sample after the owner records a consent statement.

    Claim check: MixedArtificial Analysis ranks Flash second in its voice arena. The first places Google cites come from tests by Hume AI, whose founder co-wrote Google’s post.

    Price About $0.54 to $0.81 per hour of audio until the end of the year

    Google’s new Gemini voices can copy a person’s voice

How this tracker works

An entry appears when one of our stories covers a model launch, a preview, a reported plan, or a model becoming available on a new platform. A claim is Backed when an outside test supports it, Mixed when it holds only in part or only in some settings, and Disputed when an outside test contradicts it. The date is the one the story gives; when a story gives none, it is the story’s own date. We add entries with each edition and correct them under the story when a fact changes.

Reusing this list: you may quote it with a link to this page. Facts belong to the sources each story cites.