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Coding · 2026-09-11

Full app development on a single 3090 with OpenCode

A four-bit Qwen 3.8 quant at 200K context handles complete app builds through OpenCode, left running until it hits a decision point.

Running a 4-bit Qwen 3.8 quant with a 200K context window on a 24GB RTX 3090 and 96GB of system RAM, this person builds complete apps — web and desktop OS apps across several languages — through OpenCode, leaving it running until it needs a decision from them. They lean on a 'planning with files' skill to keep track of progress across context compaction, and run reasoning effort on the highest setting even though it burns more tokens weighing options before committing.

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Reported anonymously by an r/LocalLLM contributor · 3 upvotes at capture

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SETUP HISTORY

Snapshots over time

2 versions
CURRENT2026-09-11Full app development on a single 3090 with OpenCode

A four-bit Qwen 3.8 quant at 200K context handles complete app builds through OpenCode, left running until it hits a decision point.

Coding1 machineQwen 3.8 27BRuntime unspecified
ChangedDescription
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DescriptionPreviousRunning a 4-bit Qwen 3.8 quant with a 200K context window on a 24GB RTX 3090 and 96GB of system RAM, this person builds complete apps — web and desktop OS apps across several languages — through OpenCode, leaving it running until it needs a decision from them. They lean on a 'planning with files' skill to keep track of progress across context compaction, plus several MCP servers to keep active context low, and run reasoning effort on the highest setting even though it burns more tokens weighing options before committing.This snapshotRunning a 4-bit Qwen 3.8 quant with a 200K context window on a 24GB RTX 3090 and 96GB of system RAM, this person builds complete apps — web and desktop OS apps across several languages — through OpenCode, leaving it running until it needs a decision from them. They lean on a 'planning with files' skill to keep track of progress across context compaction, and run reasoning effort on the highest setting even though it burns more tokens weighing options before committing.

This is the currently published snapshot.

REVISION 12026-09-11Full app development on a single 3090 with OpenCode

A four-bit Qwen 3.8 quant at 200K context handles complete app builds through OpenCode, left running until it hits a decision point.

Coding1 machineQwen 3.8 27BRuntime unspecified

Archived published snapshot — kept for context and comparison.

Other setups on this hardware

Regulated work · 2026-09-13Unit tests and reviews for NDA-bound client code on a single 3090
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