The newest AI models, without switching between apps.

Current flagship models

The model picker is the live source of truth because availability can change. The current lineup includes these leading model families:

• GPT-5.6Sol, Terra, and Luna, plus GPT-5.5 Thinking.
• ClaudeFable 5, Claude Sonnet 5, Opus 4.8, and Opus 4.7.
• GeminiGemini 3.5 Flash and Gemini 3.1 Pro.
• GrokGrok 4.5 and other current xAI models.
• Research modelsSonar Pro and Deep Research for source-focused work.
• More providersAdditional models from OpenAI, Anthropic, Google, Meta, xAI, DeepSeek, and others.

What you can do

• Multi-model chatSwitch models without changing your workflow.
• File and image analysisAttach supported documents or images for context.
• Web researchUse search and research modes when current sources matter.
• Study toolsTurn material into flashcards, quizzes, and explanations.
• Writing and codingBrainstorm, revise, debug, summarize, and reason through difficult work.
• Handwriting toolsRender text as customizable handwritten material.

Independent from OmniRouter and other third-party projects

TheOldLLM is not affiliated with OmniRouter or any other third-party GitHub project that analyzes, imitates, or attempts to reproduce TheOldLLM. There is no partnership, endorsement, shared ownership, or official connection between TheOldLLM and those projects.

TheOldLLM does not reverse-engineer OmniRouter or those other projects. Any project that inspects or attempts to reproduce TheOldLLM is acting independently and is analyzing or attempting to reproduce us—not the other way around. The existence of those projects should not be treated as evidence that TheOldLLM is based on or derived from them.

Access designed around model cost

You can begin without creating an account and use the standard model catalog. A verified account is required for designated frontier models, and rate limits apply to protect service availability.

AI systems can make mistakes, so important facts, calculations, citations, and decisions should always be checked against reliable sources.

Frequently asked questions

Is TheOldLLM free to use?

The chat interface can be used without payment. Model access and rate limits vary by account status and may change as the service evolves.

Do I need an account?

No for standard models. A confirmed email account is required for models in the frontier tier and enables supported sync features.

Which AI models are available?

The current lineup includes GPT-5.6 Sol, Terra, and Luna; Fable 5; Claude Sonnet 5; Claude Opus 4.8 and 4.7; Gemini 3.5 Flash and 3.1 Pro; Grok 4.5; and many more. Open the model picker for the latest availability.

Is TheOldLLM affiliated with model providers?

TheOldLLM is an independent interface. Third-party model names and logos are used for identification and remain the property of their respective owners.

Is TheOldLLM affiliated with OmniRouter or related GitHub projects?

No. TheOldLLM is not affiliated with OmniRouter or other projects that inspect, imitate, or attempt to reproduce it. TheOldLLM does not reverse-engineer those projects; any such analysis or reproduction effort is directed at TheOldLLM, not by TheOldLLM.