Skip to content

BTL-4

Bad Theory LabsOpen weightsReasoningReleased Aug 5, 2026
Compare with Claude Opus 5.5Source scores ↗
Overall score
—
Not enough evidence to rank yet
Context window
262K
262,000 tokens
Price per 1M tokens
— in · — out
No price listed
Blended price
—
3:1 input:output tokens
Output speed
—
Not measured yet

Category scores

Scores per capability area with the model's rank among ranked models in that category.

  1. 1Coding67.1
Higher is better. #N is the model's rank in that category, where it is eligible to be ranked.

Benchmark results (3)

As reported in system cards, papers and public evaluations. Position compares this model with every other model reporting the same benchmark.

Coding

SWE-bench Verified78.4#24 of 98
LiveCodeBench v666.1#34 of 46

Agentic & tool use

BFCL v473.5#3 of 19

Pricing by source

USD per 1M tokens.

SourceInputOutputCached in
List price———

Bad Theory Labs publishes BTL-4 under Apache-2.0 on Hugging Face and does not publish a first-party hosted API token price. BenchLM represents it as self-host/free-per-token before infrastructure costs.

Speed

Measured by us through OpenRouter (median of trials).

Not available on OpenRouter, so we cannot measure it yet.