{"slug":"inworld-tts","name":"Inworld TTS","domain":"inworld.ai","verdict":"As of 2026-07-15, ChatGPT, Claude, Gemini, Grok collectively rank Inworld TTS #5 of 9 for text-to-speech api for voice agents. Source: https://modelsagree.com/product/inworld-tts (modelsagree.com, CC BY 4.0).","best_rank":5,"categories":1,"entries":[{"slug":"best-text-to-speech-api-for-voice-agents","title":"Best text-to-speech API for voice agents","rank":5,"of":9,"score":3,"appearances":1,"modelRanks":{"Grok":3},"reason":"Tops or near-tops independent blind Elo/MOS benchmarks for conversational expressiveness and multi-turn naturalness; natural-language steering of emotion/style plus strong streaming suits dynamic agent personas and interactive flows.","reasons":[{"model":"Grok","reason":"Tops or near-tops independent blind Elo/MOS benchmarks for conversational expressiveness and multi-turn naturalness; natural-language steering of emotion/style plus strong streaming suits dynamic agent personas and interactive flows."}],"fixes":[{"model":"Grok","fix":"Deliver consistent sub-100ms TTFA across all tiers to compete directly on speed-critical agent deployments."}],"updated":"2026-07-15","rank_history":{"days":["2026-06-29","2026-06-30","2026-07-08","2026-07-09","2026-07-10","2026-07-12","2026-07-13","2026-07-14","2026-07-15"],"ranks":[null,null,2,null,null,9,null,null,null]},"api":"https://modelsagree.com/api/v1/best/best-text-to-speech-api-for-voice-agents.json"}],"page":"https://modelsagree.com/product/inworld-tts","check":"https://modelsagree.com/check?q=Inworld%20TTS","updated":"2026-08-10T18:18:45.051Z","attribution":"modelsagree.com, CC BY 4.0"}