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Twelve models went live today, and the OpenAI 5.6 family is most of it.

All six ChatGPT 5.6 variants are in: Luna and Luna Pro for fast, high-volume work, Terra and Terra Pro as the everyday middle, Sol and Sol Pro for hard coding and long agent runs. The six run on your free monthly credits.

Google sent two. Gemini 3.6 Flash is the interesting one, tuned to make small surgical edits instead of rewriting your entire file, which anyone who has watched a model helpfully reformat 400 lines will appreciate. Gemini 3.5 Flash Lite is free and uncapped.

Then three open-weight adds: Kimi K3 from Moonshot, Inkling from Thinking Machines, and Meta's Muse Spark 1.1, which accepts video and audio (in a future release) on top of text and images (now available). Inkling and Muse Spark are free and uncapped.

Last, Claude Opus 5. Anthropic's flagship, runs on credits.

It's been a busy stretch. If you missed our last round, that's when Claude Fable 5, Claude Sonnet 5, and Grok 4.5 showed up, alongside GLM 5.2, which is one of the rare flagship-class models here that's still free and unlimited.

Lineup is now 49 models. Brainiac will route for you if you would rather not think about it.

Whether you're the type to camp out for a new model on day one, or you just want your emails written and your invoices summarized without keeping a scorecard — you're in the right place. Nobody expects you to know what a Kimi or an Inkling is. That's the whole point of Brainiac: it knows the lineup so you don't have to.

Try the new stuff if you're curious. Ignore it if you're not. Either way, we've got you covered.

— Jeff

Model list last updated July 31, 2026. 12 new additions marked NEW. 49 models total.

Anthropic

Model

Access

Claude Haiku 4.5

Free Unlimited

Claude Sonnet 4.6

Uses Credits

Claude Opus 4.8 NEW

Uses Credits

Claude Fable 5 NEW

Uses Credits

Claude Sonnet 5 NEW

Uses Credits

Claude Opus 5 NEW

Uses Credits

OpenAI

Model

Access

GPT-4o mini

Free Unlimited

GPT-5 Nano

Free Unlimited

GPT-5.4

Uses Credits

GPT-5.4 Mini

Free Unlimited

GPT-5.4 Nano

Free Unlimited

GPT-5.5

Uses Credits

gpt-oss-120b

Free Unlimited

gpt-oss-20b

Free Unlimited

GPT-5.6 Luna NEW

Uses Credits

GPT-5.6 Luna Pro NEW

Uses Credits

GPT-5.6 Terra NEW

Uses Credits

GPT-5.6 Terra Pro NEW

Uses Credits

GPT-5.6 Sol NEW

Uses Credits

GPT-5.6 Sol Pro NEW

Uses Credits

Google

Model

Access

Gemini 3.1 Flash Lite

Free Unlimited

Gemini 3.1 Pro Preview

Uses Credits

Gemini 3.5 Flash

Uses Credits

Gemini 3.6 Flash NEW

Uses Credits

Gemini 3.5 Flash Lite NEW

Free Unlimited

xAI

Model

Access

Grok 4.3

Free Unlimited

Grok 4.5 NEW

Uses Credits

Z.ai

Model

Access

GLM 5.2 NEW

Free Unlimited

MiniMax

Model

Access

MiniMax M2

Free Unlimited

MiniMax M2.7

Free Unlimited

MiniMax M3 NEW

Free Unlimited

NVIDIA

Model

Access

Nemotron 3 Ultra NEW

Free Unlimited

MoonshotAI

Model

Access

Kimi K2 Thinking

Free Unlimited

Kimi K2.5

Free Unlimited

Kimi K2.6

Free Unlimited

Kimi K3 NEW

Uses Credits

Thinking Machines

Model

Access

Inkling NEW

Free Unlimited

Meta

Model

Access

Llama 4 Maverick

Free Unlimited

Llama 4 Scout

Free Unlimited

Muse Spark 1.1 NEW

Uses Credits

DeepSeek

Model

Access

DeepSeek V3.2

Free Unlimited

DeepSeek V4 Pro

Free Unlimited

Cohere

Model

Access

Command R7B

Free Unlimited

Mistral

Model

Access

Mistral Small 3.2 24B

Free Unlimited

Mistral Small 4

Free Unlimited

Perplexity

Model

Access

Sonar

Free Unlimited

Sonar Deep Research

Uses Credits

Sonar Pro

Uses Credits

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