The best LLM for Godot

A table that names one best model for Godot is wrong on the day the next model ships. Claude Opus 5.5 was released on 22 September 2026. Claude Sonnet 5.5 was released on 28 September 2026. Six days apart, and both replaced the recommendation a spring article would still be printing.

What lasts is the job. A GDScript function, a scene edit through an MCP tool call, and an agent loop that runs for an hour do not want the same thing from a model. The sections below are dated to the vendor page they were read from. When a model launches, that section is the one that moves, and this URL stays.

GDScript is a short coding task with a strict runtime. The model has to emit Godot 4, typed where the project is typed, and a signal connection that actually exists. Speed matters, because you run the script and come back. Anthropic describes Claude Sonnet 5.5 as the best combination of speed and intelligence in its current lineup, with a 1M-token context window and fast comparative latency. That is the public case for it on a single script. It is not a Godot benchmark.

Scene editing through MCP is tool use. The model reads a scene, calls a tool, reads the tool result, and calls the next tool. On 3 October 2026 the Claude docs say Claude Opus 5.5 and Claude Sonnet 5.5 both return an error when a request forces a specific tool. An agent loop that lets the model choose the tool still matches what those pages describe. A loop that requires one named tool call does not, until the vendor page says otherwise.

A long agent loop is a context-window problem before it is a quality problem. Every tool result stays in the conversation until something summarises it. Claude Opus 5.5, Claude Sonnet 5.5, and Gemini 3.8 Flash each publish a window of about a million tokens. OpenAI's API page for GPT-5.5 publishes 1,050,000. The 23 April 2026 announcement puts GPT-5.5 in Codex at 400K. The same model name is not the same window. A Godot session that keeps every GDScript parse error will hit 400K first.

Dated 3 October 2026, from Anthropic's model page. Released 22 September 2026. Model id claude-opus-5-5. Anthropic describes it as built for long-running agentic coding and knowledge work. Context window 1M tokens, max output 128K, adaptive thinking always on, default effort medium, knowledge cutoff June 2026. API price on that page: $4 per million input tokens and $20 per million output tokens.

For a long Godot session that is the relevant line: long-running agentic coding, and a 1M window. The limitation on the same page is that forced tool use returns an error, and thinking cannot be turned off. A scene-editing loop that demands one tool by name is the case that page says will fail. The page does not mention Godot, GDScript, or MCP.

Dated 3 October 2026, from Anthropic's model page. Released 28 September 2026. Model id claude-sonnet-5-5. Anthropic calls it the best combination of speed and intelligence. Context window 1M tokens, max output 128K, adaptive thinking, default effort high, comparative latency fast, knowledge cutoff June 2026. API price on that page: $2 per million input tokens and $10 per million output tokens.

For a GDScript edit you are about to run, the public case is the speed line, not a claim that it knows Godot 4 better than Opus. Forced tool use returns an error on this model too. Setting temperature, top_p, or top_k off the default returns a 400. The page does not mention Godot.

More on this: Making games with Ollama, and what that does not buy you

Dated 3 October 2026, from OpenAI's API model page and the 23 April 2026 announcement. The API page calls GPT-5.5 a flagship model for complex professional work, with a 1,050,000-token context window, 128,000 max output tokens, and a knowledge cutoff of 1 December 2025. API price on that page: $5 per million input tokens and $30 per million output tokens. Prompts over 272K input tokens are priced higher for the whole session.

The announcement says GPT-5.5 in Codex has a 400K context window, on Plus, Pro, Business, Enterprise, Edu, and Go. ChatGPT Plus is the plan that runs in Flockbay, and Codex is how that plan builds. A long agent loop on that plan is the 400K window, not the API's million, unless OpenAI's Codex page later says otherwise. Neither page publishes a Godot score. Tool use on the API page includes function calling and hosted tools, including MCP.

Dated 3 October 2026, from Google's Gemini API model page, which lists Gemini 3.8 Flash as stable. Google describes it as its most intelligent Flash model, for long-horizon software engineering and autonomous agents. Input token limit 1,048,576. Output token limit 65,536. Function calling, code execution, and structured outputs are supported. Computer use is marked preview. Thinking supports low, medium, and high, and the page says minimal returns an error. The page's latest-update line says September 2026. It does not mention Godot.

Gemini is not one of the two plans Flockbay builds on. It belongs in this comparison because the search is for a model, not for a Flockbay plan. A Gemini key is not what the app offers first.

Dated from the Qwen team's post of 22 July 2025, which is the open-weight card this edition uses. Qwen3-Coder-480B-A35B-Instruct is a mixture-of-experts model, 480B parameters with 35B active. The post says it supports 256K tokens of context natively and 1M with extrapolation, and that it was trained for agentic coding and tool use. The same post compares it with Claude Sonnet 4, which is two generations behind the Claude models above. Treat that comparison as historical.

256K native context is the smallest window in this set. A long Godot agent loop that keeps tool results will fill it before it fills a 1M window. Running the weights yourself is the reason to pick it: the machine is yours, and the vendor page is not metering the turn. This page will replace the section when a newer open-weight card is the one worth citing. It does not claim Qwen3-Coder is the best open model in October 2026. No Godot score is on the post.

A share from Flockbay's own building turns is published only when the group is at least 20 machines, and never as a cost. On 3 October 2026 no named model cleared that floor, so this page does not print a model share and does not print a teaser of one. The optional benchmark, the same Godot task on each model until Play, was not run.

The account is the part that is settled. Flockbay is free on Claude Pro or Max, or on ChatGPT Plus or higher. Claude Free and ChatGPT Free do not run here. The model menu on a paid Flockbay plan is optional, a credit reload at API prices. The setup for the account is Claude or ChatGPT with Godot.