BixBench current item

bix-54-q7

Question

What is the maximum colony area predicted at the optimal frequency (proportion of strain 287 in the mixtures) according to the best-fitting model among quadratic, cubic and natural spline (df=4) models? Use R for model fitting.

Accepted answer
(184000,185000)
Domain
model fitting

Comparison

Pass counts and token totals across the same three replicates.

AgentGalaxy-API codeOpen-ended code
Codex GPT-5.50/3
replicate 1 replicate 2 replicate 3
2.01M total		0/3
replicate 1 replicate 2 replicate 3
313.2K total
Codex GPT-5.6 Sol0/3
replicate 1 replicate 2 replicate 3
3.80M total		0/3
replicate 1 replicate 2 replicate 3
351.2K total
Codex GPT-5.6 Luna0/3
replicate 1 replicate 2 replicate 3
5.70M total		0/3
replicate 1 replicate 2 replicate 3
696.4K total
DeepSeek V4 Pro via Codex0/3
replicate 1 replicate 2 replicate 3
4.83M total		1/3
replicate 1 replicate 2 replicate 3
3.05M total
DeepSeek V4 Pro via Claude Codesuperseded0/3
replicate 1 replicate 2 replicate 3
3.95M total		0/3
replicate 1 replicate 2 replicate 3
776.2K total

Execution condition

Galaxy-API code with skills

Codex GPT-5.5

3 primary replicates
Codex GPT-5.5

replicate 1

failUDT-only

Why it missed

Benchmark specification issueThis run fit the requested quadratic, cubic, and natural-spline models and converged near 178,984. The accepted 184,000-185,000 range requires an undocumented choice about which endpoint or mixture rows belong in the curve.
Answer178983.924986248
Workflow
Galaxy UDTcolony morphology summaryspline regressionAIC model selection
Total tokens
566.6K
Output
4.9K
Galaxy historyRun trace
Codex GPT-5.5

replicate 2

failUDT-only

Why it missed

Benchmark specification issueThis run fit the requested quadratic, cubic, and natural-spline models and converged near 178,984. The accepted 184,000-185,000 range requires an undocumented choice about which endpoint or mixture rows belong in the curve.
Answer178983.9249862484
Workflow
Galaxy UDTscikit-learncolony morphology summaryAIC model selection
Total tokens
819.0K
Output
6.8K
Galaxy historyRun trace
Codex GPT-5.5

replicate 3

failUDT-only

Why it missed

Benchmark specification issueThis run fit the requested quadratic, cubic, and natural-spline models and converged near 178,984. The accepted 184,000-185,000 range requires an undocumented choice about which endpoint or mixture rows belong in the curve.
Answer178983.925081596
Workflow
Galaxy UDTAIC model selection
Total tokens
626.5K
Output
7.0K
Galaxy historyRun trace

Codex GPT-5.6 Sol

3 primary replicates
Codex GPT-5.6 Sol

replicate 1

failUDT-only

Why it missed

Benchmark specification issueThese runs followed the visible quadratic, cubic, and spline instructions and obtained about 178,984 or 180,771. Reaching the accepted 184,000-185,000 range requires an unstated endpoint or mixture-row selection rule.
Answer178983.925081597
Workflow
Galaxy UDT
Total tokens
1.78M
Output
16.4K
Galaxy historyRun trace
Codex GPT-5.6 Sol

replicate 2

failUDT-only

Why it missed

Benchmark specification issueThese runs followed the visible quadratic, cubic, and spline instructions and obtained about 178,984 or 180,771. Reaching the accepted 184,000-185,000 range requires an unstated endpoint or mixture-row selection rule.
Answer180771.3635587
Workflow
Galaxy UDTcolony morphology summaryspline regressionAIC model selection
Total tokens
530.3K
Output
5.8K
Galaxy historyRun trace
Codex GPT-5.6 Sol

replicate 3

failUDT-only

Why it missed

Benchmark specification issueThese runs followed the visible quadratic, cubic, and spline instructions and obtained about 178,984 or 180,771. Reaching the accepted 184,000-185,000 range requires an unstated endpoint or mixture-row selection rule.
Answer180771.363559
Workflow
Galaxy UDTcolony morphology summaryspline regressionAIC model selection
Total tokens
1.49M
Output
12.1K
Galaxy historyRun trace

Codex GPT-5.6 Luna

3 primary replicates
Codex GPT-5.6 Luna

replicate 1

failUDT-only

Why it missed

Benchmark specification issueThese runs followed the visible model instructions and obtained about 178,984 or 180,771. The accepted range depends on an unstated endpoint or mixture-row scope.
Answer178983.924748926
Workflow
Galaxy UDTAIC model selectionmean summary
Total tokens
1.48M
Output
24.0K
Galaxy historyRun trace
Codex GPT-5.6 Luna

replicate 2

failUDT-only

Why it missed

Benchmark specification issueThese runs followed the visible model instructions and obtained about 178,984 or 180,771. The accepted range depends on an unstated endpoint or mixture-row scope.
Answer178983.924748926
Workflow
Galaxy UDTcolony morphology summaryspline regressionAIC model selection
Total tokens
2.77M
Output
25.8K
Galaxy historyRun trace
Codex GPT-5.6 Luna

replicate 3

failUDT-only

Why it missed

Benchmark specification issueThese runs followed the visible model instructions and obtained about 178,984 or 180,771. The accepted range depends on an unstated endpoint or mixture-row scope.
Answer180771.363486404
Workflow
Galaxy UDT
Total tokens
1.44M
Output
18.1K
Galaxy historyRun trace

DeepSeek V4 Pro via Codex

3 primary replicates
DeepSeek V4 Pro via Codex

replicate 1

failUDT-only

Evaluation status

Manual review pendingThe evaluator marked this answer incorrect. The answer, workflow summary, usage, and available run records are linked, but a manual root-cause audit has not yet been added.
Answer180771.363486404
Workflow
Galaxy UDT
Total tokens
1.03M
Output
23.0K
Galaxy historyRun trace
DeepSeek V4 Pro via Codex

replicate 2

fail

Evaluation status

Manual review pendingThe evaluator marked this answer incorrect. The answer, workflow summary, usage, and available run records are linked, but a manual root-cause audit has not yet been added.
Answer180771.363558699
Workflow
Galaxy via BioBlendspline regressionAIC model selection
Total tokens
2.21M
Output
29.1K
Galaxy historyRun trace
DeepSeek V4 Pro via Codex

replicate 3

failUDT-only

Evaluation status

Manual review pendingThe evaluator marked this answer incorrect. The answer, workflow summary, usage, and available run records are linked, but a manual root-cause audit has not yet been added.
Answer180771.362154121
Workflow
Galaxy via BioBlendspline regressionAIC model selectioncolony morphology summary
Total tokens
1.59M
Output
26.6K
Galaxy historyRun trace

DeepSeek V4 Pro via Claude CodeSuperseded

3 primary replicates
DeepSeek V4 Pro via Claude Code

replicate 1

failUDT-only

Why it missed

Benchmark specification issueThis run followed the visible model instructions and converged near 178,984. The accepted range depends on an unstated row or endpoint scope.
Answer178984
Workflow
Galaxy UDTcolony morphology summaryAIC model selection
Total tokens
838.8K
Output
15.7K
Galaxy historyRun trace
DeepSeek V4 Pro via Claude Code

replicate 2

failUDT-only

Why it missed

Benchmark specification issueThis run followed the visible model instructions and converged near 178,984. The accepted range depends on an unstated row or endpoint scope.
Answer178983.924986248
Workflow
Galaxy via BioBlendcolony morphology summaryAIC model selection
Total tokens
971.0K
Output
14.6K
Galaxy historyRun trace
DeepSeek V4 Pro via Claude Code

replicate 3

failUDT-only

Why it missed

Benchmark specification issueThis run followed the visible model instructions and converged near 178,984. The accepted range depends on an unstated row or endpoint scope.
Answer178983.914770
Workflow
Galaxy UDTcolony morphology summaryspline regressionAIC model selection
Total tokens
2.14M
Output
30.4K
Galaxy historyRun trace

Execution condition

Open-ended code with skills

Codex GPT-5.5

3 primary replicates
Codex GPT-5.5

replicate 1

fail

Why it missed

Benchmark specification issueThis run followed the visible model instructions and obtained about 178,984. Reaching the accepted range requires an unstated endpoint-selection rule.
Answer178983.925082
Workflow
Local analysisAIC model selectionspline regression
Total tokens
111.2K
Output
3.8K
Run trace
Codex GPT-5.5

replicate 2

fail

Why it missed

Row scope changedThis run used a different endpoint or mixture-row scope and obtained 180,771. The task does not state the additional selection needed to reach the accepted 184,000-185,000 range.
Answer180771.362
Workflow
Local analysisAIC model selection
Total tokens
109.2K
Output
3.2K
Run trace
Codex GPT-5.5

replicate 3

fail

Why it missed

Benchmark specification issueThis run followed the visible model instructions and obtained about 178,984. Reaching the accepted range requires an unstated endpoint-selection rule.
Answer178983.9248932825
Workflow
Local analysisAIC model selectionspline regression
Total tokens
92.7K
Output
3.5K
Run trace

Codex GPT-5.6 Sol

3 primary replicates
Codex GPT-5.6 Sol

replicate 1

fail

Why it missed

Benchmark specification issueThese runs followed the visible model instructions and obtained about 178,984 or 180,771. The accepted range depends on an unstated endpoint or mixture-row scope.
Answer180771.363558699
Workflow
Local analysis
Total tokens
123.9K
Output
3.8K
Run trace
Codex GPT-5.6 Sol

replicate 2

fail

Why it missed

Benchmark specification issueThese runs followed the visible model instructions and obtained about 178,984 or 180,771. The accepted range depends on an unstated endpoint or mixture-row scope.
Answer178983.925
Workflow
Local analysis
Total tokens
124.6K
Output
3.3K
Run trace
Codex GPT-5.6 Sol

replicate 3

fail

Why it missed

Benchmark specification issueThese runs followed the visible model instructions and obtained about 178,984 or 180,771. The accepted range depends on an unstated endpoint or mixture-row scope.
Answer180771.363558699
Workflow
Local analysis
Total tokens
102.8K
Output
2.4K
Run trace

Codex GPT-5.6 Luna

3 primary replicates
Codex GPT-5.6 Luna

replicate 1

fail

Why it missed

Benchmark specification issueThese runs followed the visible model instructions and obtained about 180,771. The accepted range depends on an unstated endpoint or mixture-row scope.
Answer180771.3635587
Workflow
Local analysis
Total tokens
241.5K
Output
8.5K
Run trace
Codex GPT-5.6 Luna

replicate 2

fail

Why it missed

Benchmark specification issueThese runs followed the visible model instructions and obtained about 180,771. The accepted range depends on an unstated endpoint or mixture-row scope.
Answer180771.36
Workflow
Local analysis
Total tokens
219.3K
Output
8.0K
Run trace
Codex GPT-5.6 Luna

replicate 3

fail

Why it missed

Benchmark specification issueThese runs followed the visible model instructions and obtained about 180,771. The accepted range depends on an unstated endpoint or mixture-row scope.
Answer180771.3635587
Workflow
Local analysis
Total tokens
235.6K
Output
6.2K
Run trace

DeepSeek V4 Pro via Codex

3 primary replicates
DeepSeek V4 Pro via Codex

replicate 1

fail

Evaluation status

Manual review pendingThe evaluator marked this answer incorrect. The answer, workflow summary, usage, and available run records are linked, but a manual root-cause audit has not yet been added.
Answer180771.3620113
Workflow
Local analysisAIC model selectionspline regressionlogistic regressionstatsmodelsSciPy
Total tokens
1.89M
Output
32.8K
Run trace
DeepSeek V4 Pro via Codex

replicate 2

pass
Answer184371.846
Workflow
Local analysisAIC model selection
Total tokens
680.8K
Output
11.7K
Run trace
DeepSeek V4 Pro via Codex

replicate 3

fail

Evaluation status

Manual review pendingThe evaluator marked this answer incorrect. The answer, workflow summary, usage, and available run records are linked, but a manual root-cause audit has not yet been added.
Answer180771.3635586997
Workflow
Local analysisAIC model selectionmean summary
Total tokens
478.9K
Output
12.4K
Run trace

DeepSeek V4 Pro via Claude CodeSuperseded

3 primary replicates
DeepSeek V4 Pro via Claude Code

replicate 1

fail

Why it missed

Benchmark specification issueThis run followed the visible model instructions and returned about 178,984. The accepted range depends on an unstated row or endpoint scope.
Answer178983.9
Workflow
Local analysisspline regression
Total tokens
310.6K
Output
4.9K
Run trace
DeepSeek V4 Pro via Claude Code

replicate 2

fail

Why it missed

Benchmark specification issueThis run followed the visible model instructions and returned about 178,984. The accepted range depends on an unstated row or endpoint scope.
Answer178983.9
Workflow
Local analysis
Total tokens
256.6K
Output
4.2K
Run trace
DeepSeek V4 Pro via Claude Code

replicate 3

fail

Why it missed

Benchmark specification issueThis run followed the visible model instructions and returned about 178,984. The accepted range depends on an unstated row or endpoint scope.
Answer178983.92
Workflow
Local analysis
Total tokens
209.0K
Output
3.4K
Run trace

bix-54-q7 · October 2026 · three additional replicates

GPT-5.6 Sol · token optimization

Galaxy-API code, high reasoning, Fast service. Previous runs are retained above.

Open-ended code averaged 0.12M tokens; previous website Galaxy averaged 1.27M; the new Galaxy runs averaged 0.57M, or 4.86× Open-ended code. Each mean covers three replicates of this same task with GPT-5.6 Sol.

Cached input is already included in input tokens. Full nested tool/job evidence is in each HF run's galaxy_execution_records.tar.gz, with an accompanying member index.

Optimization overview and all 150 runs