What each model is actually for

Claude Opus 5.5 is Anthropic’s current Opus, summed up in its docs as "For long-running agentic coding and knowledge work".

Opus 5 earns its price on work where being wrong is expensive to discover: long documents that must stay consistent end to end, and code changes landing in a codebase someone else maintains.

Sol is the reasoning-weighted rung of the GPT-5.6 ladder. Reach for it when a task has a checkable right answer that Terra and Luna keep missing - a multi-step derivation, a contract read for what it omits, a bug living between two correct files.

Astra is OpenAI’s newest flagship. Measured at max effort by Artificial Analysis, it ties Claude Fable 5.1 at 53 on Intelligence Index v4.3.

Flux 2 Pro is the render to reach for when a brief has clauses - a stated layout, an exact object count, words that must be spelled correctly on a sign or a package.

GPT Image 2.5 Flare is OpenAI’s fast, high-quality everyday image model, and on TulexAI every render runs at high quality for 63 PT an image.

Kling 3.0 is what you reach for when physics is the thing that breaks - contact, weight, an object crossing frame while the camera travels.

Veo 3.1 is the engine to reach for when a shot has to be photoreal and carry audio, because it renders dialogue, ambience and effects with the picture and removes an entire post step.

ElevenLabs is the voice to reach for when delivery carries the line - the pause before a reveal, emphasis landing where you wrote it.