Claude Haiku 5.5 — Anthropic — Released 7 October 2026 (8 days ago) · Index score 43/100 · Closed weights
Anthropic's released small model is designed for fast, high-volume, cost-sensitive work such as support, summaries and classification.
GPT-6.1 Sol — OpenAI — Released 29 September 2026 (16 days ago) · Index score 52/100 · Closed weights
OpenAI's near-Astra Sol model is available through the API and paid Work/Codex plans for complex coding and professional work.
Claude Sonnet 5.5 — Anthropic — Released 28 September 2026 (17 days ago) · Index score 56/100 · Closed weights
Anthropic's newly released Sonnet 5.5 is a faster, lower-cost model for everyday coding, analysis and business documents.
Claude Opus 5.5 — Anthropic — Released 22 September 2026 (23 days ago) · Index score 58/100 · Closed weights
Anthropic's newest flagship is generally available for demanding coding, analysis and long-running knowledge work.
Gemini 3.8 Flash TTS — Google — Released 22 September 2026 (23 days ago) · Closed weights
Google's generally available speech model turns written scripts into expressive, studio-quality audio.
Gemini 3.8 Flash-Lite TTS — Google — Released 22 September 2026 (23 days ago) · Closed weights
Google's lower-cost speech model is designed for high-throughput production and realtime voice agents.
GPT-6 Luna — OpenAI — Released 22 September 2026 (23 days ago) · Index score 38/100 · Closed weights
OpenAI's efficient Luna model is available through the API for focused, high-volume work.
GPT-6 Sol — OpenAI — Released 22 September 2026 (23 days ago) · Index score 48/100 · Closed weights
OpenAI's newer Sol model is available through the API and is aimed at complex coding and agentic workflows.
Grok 4.7 — xAI — Released 21 September 2026 (24 days ago) · Index score 46/100 · Closed weights
xAI's newest hosted model is available through the API for coding, agentic tasks and knowledge work.
Qwen3.8 Omni Flash Realtime — Alibaba — Released 21 September 2026 (24 days ago) · Closed weights
Alibaba's hosted realtime variant supports live multimodal conversations through the Model Studio API.
Qwen3.8 Omni Flash — Alibaba — Released 20 September 2026 (25 days ago) · Closed weights
Alibaba's hosted omnimodal model handles text, image, audio and video for agentic media workflows.
Grok Voice Transcribe 2.0 — xAI — Released 17 September 2026 (28 days ago) · Closed weights
xAI's released speech-to-text model handles batch and live transcription, but it is not a general-capability model with a comparable overall score.
Gemini 3.8 Live — Google — Released 15 September 2026 (30 days ago) · Closed weights
Google's stable real-time voice model is designed for low-latency conversations without extended reasoning.
Gemini 3.8 Live Extended Thinking — Google — Released 15 September 2026 (30 days ago) · Closed weights
Google's stable voice model adds deeper background reasoning for more demanding live interactions.
Expected soon: GPT-Rosalind — OpenAI
OpenAI's life-sciences model is available only to approved organisations through a trusted-access programme, not to ordinary paying users. (noted since 16 April 2026)
Expected soon: Claude Mythos 5.1 — Anthropic
Anthropic's restricted model remains limited to vetted organisations through trusted-access programmes, so it is not generally available. (noted since 1 September 2026)
Expected soon: Muse Spark open weights — Meta
Meta's next frontier model, promised as open weights — a first for a western frontier line (OpenAI's 120B and Google's Gemma 4 are specific open-weight builds, not the frontier line). (noted since 2 September 2026)