AI chat models
Try leading AI chat and reasoning models including GPT, Claude, and Gemini online · 8 models currently available · 24 models available for reference only
Compare chat models for Q&A, reasoning, coding, long-document analysis, prompt refinement, and image understanding.
Claude Opus 4.7
Kyeo AI offers Claude Opus 4.7 as a text-only chat model for demanding analysis and writing, with up to 20,000 characters per message, 40 submitted messages of history, and at most 4,096 output tokens per response.
Claude Sonnet 4.6
Claude Sonnet 4.6 is a text-only migration baseline on Kyeo AI between Sonnet 4.5 and Sonnet 5. It is no longer Anthropic's newest Sonnet, but remains useful for rerunning established 4.6 workflows or comparing 4.5, 4.6, and newer Kyeo AI models on the same tasks. This implementation is narrower than the official platform: each new message is limited to 20,000 JavaScript characters, only the 40 most recent messages are included, and attachments, web search, thinking, and tool execution are not exposed.
Claude Sonnet 4.5
Kyeo AI offers Claude Sonnet 4.5 as a text-only chat model for demanding analysis and writing, with up to 20,000 characters per message, 40 submitted messages of history, and at most 4,096 output tokens per response.
Claude Haiku 4.5
Claude Haiku 4.5 is a text-only Text chat entry on this site. Each new message is limited to 20,000 characters and a request includes only the 40 most recently submitted messages; images, web search, reasoning/thinking, and tool configuration are not available.
Claude Opus 4.8
Claude Opus 4.8 is designed for high-complexity text analysis and consequential writing. Kyeo AI offers text-only chat with up to 20,000 characters per message and an explicit 4,096-token maximum output.
Claude Fable 5
Claude Fable 5 is designed for demanding narrative development and creative collaboration. Kyeo AI offers text-only access with a 4,096-token maximum output and sends no tool or attachment fields.
Claude Sonnet 5
Claude Sonnet 5 is the more balanced Claude candidate in this batch for research, code explanation, and structured writing. Its maximum output on this site is 4,096 tokens.
Claude Opus 5
Claude Opus 5 is a flagship candidate for high-complexity text work. Kyeo AI limits each message to 20,000 characters, includes the 40 most recent submitted messages, and caps output at 4,096 tokens.
GPT-5.5 has documented text, reasoning, and search capabilities, but this site cannot yet calculate a reliable maximum cost before a request. Its details remain available while generation stays disabled.
Full model documentation remains available, but online generation is currently unavailable.
GPT-5.4 has documented text, reasoning, and search capabilities, but this site cannot yet calculate a reliable maximum cost before a request. Its details remain available while generation stays disabled.
Full model documentation remains available, but online generation is currently unavailable.
GPT-5.4 Codex has documented text, reasoning, and search capabilities, but this site cannot yet calculate a reliable maximum cost before a request. Its details remain available while generation stays disabled.
Full model documentation remains available, but online generation is currently unavailable.
GPT-5.3 Codex has documented text, reasoning, and search capabilities, but this site cannot yet calculate a reliable maximum cost before a request. Its details remain available while generation stays disabled.
Full model documentation remains available, but online generation is currently unavailable.
GPT-5.2 has documented text, reasoning, and search capabilities, but this site cannot yet calculate a reliable maximum cost before a request. Its details remain available while generation stays disabled.
Full model documentation remains available, but online generation is currently unavailable.
GPT-5.2 Codex has documented text, reasoning, and search capabilities, but this site cannot yet calculate a reliable maximum cost before a request. Its details remain available while generation stays disabled.
Full model documentation remains available, but online generation is currently unavailable.
GPT-5.1 Codex has documented text, reasoning, and search capabilities, but this site cannot yet calculate a reliable maximum cost before a request. Its details remain available while generation stays disabled.
Full model documentation remains available, but online generation is currently unavailable.
GPT-5 Codex has documented text, reasoning, and search capabilities, but this site cannot yet calculate a reliable maximum cost before a request. Its details remain available while generation stays disabled.
Full model documentation remains available, but online generation is currently unavailable.
Gemini 3.1 Pro has documented text, reasoning, and search capabilities, but this site cannot yet calculate a reliable maximum cost before a request. Its details remain available while generation stays disabled.
Full model documentation remains available, but online generation is currently unavailable.
Gemini 3 Pro has documented text, reasoning, and search capabilities, but this site cannot yet calculate a reliable maximum cost before a request. Its details remain available while generation stays disabled.
Full model documentation remains available, but online generation is currently unavailable.
Gemini 3 Flash has documented text, reasoning, and search capabilities, but this site cannot yet calculate a reliable maximum cost before a request. Its details remain available while generation stays disabled.
Full model documentation remains available, but online generation is currently unavailable.
Gemini 2.5 Pro has documented text, reasoning, and search capabilities, but this site cannot yet calculate a reliable maximum cost before a request. Its details remain available while generation stays disabled.
Full model documentation remains available, but online generation is currently unavailable.
Gemini 2.5 Flash has documented text, reasoning, and search capabilities, but this site cannot yet calculate a reliable maximum cost before a request. Its details remain available while generation stays disabled.
Full model documentation remains available, but online generation is currently unavailable.
Claude Opus 4.6 — A provable maximum output-usage boundary is not yet available, so no request is created and no credits are charged.
Full model documentation remains available, but online generation is currently unavailable.
Claude Opus 4.5 — A provable maximum output-usage boundary is not yet available, so no request is created and no credits are charged.
Full model documentation remains available, but online generation is currently unavailable.
GPT-5.6 Luna has documented text, reasoning, and search capabilities, but this site cannot yet calculate a reliable maximum cost before a request. Its details remain available while generation stays disabled.
Full model documentation remains available, but online generation is currently unavailable.
GPT-5.6 Terra targets more complex text and reasoning work, but the maximum output usage required for reliable preauthorization is not yet locked. For now, this page provides verified information and alternative paths only.
Full model documentation remains available, but online generation is currently unavailable.
Sol is the high-cost flagship candidate in the GPT-5.6 series for people tracking extremely complex tasks. Until its worst-case output cost can be proven, this site publishes the boundary without enabling generation.
Full model documentation remains available, but online generation is currently unavailable.
Gemini 3.5 Flash has confirmed text chat, low/high reasoning, and optional thought output. Because a reliable maximum output cost is not yet available, its details remain visible but messages cannot be submitted.
Full model documentation remains available, but online generation is currently unavailable.
Gemini 3.6 Flash has documented text-chat and reasoning capabilities, but a reliable maximum output estimate is not yet available. Its details remain visible while the model stays unavailable in the selector.
Full model documentation remains available, but online generation is currently unavailable.
Gemini 3.7 Flash targets coding, agents, and complex workflows, but a reliable maximum output estimate is not yet available. Its details remain visible while messages cannot be submitted.
Full model documentation remains available, but online generation is currently unavailable.
Grok 4.3 — A Grok chat candidate for reasoning, multi-step conversations, search, and function-tool workflows. Generation unavailable.
Full model documentation remains available, but online generation is currently unavailable.
Grok 4.5 — A Grok chat candidate for reasoning, multi-step conversations, search, and function-tool workflows. Generation unavailable.
Full model documentation remains available, but online generation is currently unavailable.
Grok 4.6 — A Grok chat candidate for reasoning, multi-step conversations, search, and function-tool workflows. Generation unavailable.
Full model documentation remains available, but online generation is currently unavailable.
Kimi K3 is currently listed as Coming Soon, with only a Chat category label available. This public information page explains its current status, but the model cannot create conversations, receive messages, or accept attachments on Kyeo AI yet.