Claude Sonnet 4.6, GPT-5.4 & GPT-5.3 Codex — Now Free on Buda
Use Claude Sonnet 4.6, GPT-5.4, and GPT-5.3 Codex free on Buda. No upgrade, no credit card — just sign up and pick the model.
Three more frontier models just moved into Buda's free plan. No upgrade, no credit card — sign up and use them.
What's New
Until today, Claude Sonnet 4.6, GPT-5.4, and GPT-5.3 Codex were gated behind Plus or Pro. Starting this release, all three are fully available on the free plan.
Claude Sonnet 4.6 — Free
Anthropic's workhorse model for everyday reasoning, long-context reading, and balanced coding work. Now the default recommendation when Haiku isn't enough and Opus is overkill.
GPT-5.4 — Free
OpenAI's general-purpose frontier model. Strong at planning, tool use, and multi-turn agent loops. A solid pick for anything you'd previously reach for Sonnet for.
GPT-5.3 Codex — Free
The coding-optimized sibling of GPT-5.3. Trained hard on repository-scale edits, diff reasoning, and test-driven workflows. If you're wiring agents into a real codebase, start here.
Free Plan Models at a Glance
| Model | Credits | Best For |
|---|---|---|
| DeepSeek V4 Flash | 0.1x | High-volume agent tasks |
| GPT-5 Mini | 0.6x | Quick turns, cheap iteration |
| Gemini 3.1 Flash | 1.0x | Balanced default |
| DeepSeek V4 Pro | 1.6x | Frontier reasoning on a budget |
| Claude Haiku 4.5 | 1.6x | Fast Anthropic calls |
| Gemini 3.1 Pro | 4.0x | Long-context Gemini work |
| GPT-5.3 Codex | 4.4x | Coding agents |
| Claude Sonnet 4.6 | 4.8x | Everyday reasoning |
| GPT-5.4 | 5.0x | General-purpose frontier |
Why More Free Models
Credits already handle the economics — the same task costs the same whether you're on free or paid. Gating model choice on top of that was one lever too many. Cutting it out means free users get to match model to task the same way Plus and Pro users do.
Plus/Pro is still where you go for higher monthly credit allowances, Opus 4.x, and GPT-5.5 — but model selection should never be the reason to upgrade.
Pick the right model for the job at buda.im/dashboard.