2026-10-20UPDATEPlatform updated: 52 models tracked across 42 independent benchmarks including CorpFin • 2026-10-20BENCHCorpFin added to benchmark suite — long credit agreement comprehension evaluations live • 2026-10-19MODELClaude Sonnet 5.5 and Opus 5.5 achieve 75.9% and 75.8% on Excel Modeling Benchmark v1.1 • 2026-10-19MODELTax Agent Bench updated: Claude Fable 5.1 (49.2%) and Gemini 4 Argon (44.6%) lead corporate tax research • 2026-10-18MODELGemini 4 Argon claims #1 rank on Finance Agent (v2) with 65.4% • 2026-10-13MODELGoogle launches Gemini 4 Argon with 1M-token output limit and native multimodal reasoning • 2026-10-06MODELAnthropic completes Claude 5.5 generation with Claude Haiku 5.5, Opus 5.5, and Sonnet 5.5 • 2026-10-20UPDATEPlatform updated: 52 models tracked across 42 independent benchmarks including CorpFin • 2026-10-20BENCHCorpFin added to benchmark suite — long credit agreement comprehension evaluations live • 2026-10-19MODELClaude Sonnet 5.5 and Opus 5.5 achieve 75.9% and 75.8% on Excel Modeling Benchmark v1.1 • 2026-10-19MODELTax Agent Bench updated: Claude Fable 5.1 (49.2%) and Gemini 4 Argon (44.6%) lead corporate tax research • 2026-10-18MODELGemini 4 Argon claims #1 rank on Finance Agent (v2) with 65.4% • 2026-10-13MODELGoogle launches Gemini 4 Argon with 1M-token output limit and native multimodal reasoning • 2026-10-06MODELAnthropic completes Claude 5.5 generation with Claude Haiku 5.5, Opus 5.5, and Sonnet 5.5 •
Home/Models/GPT-5.6 Sol
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GPT-5.6 Sol

Proprietary#11 on FB Leaderboard1M contextReleased 2026-07-0929 benchmarks evaluated
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65.1
FB Score
#11
Overall rank
FB Score65.1Rank #11
Best benchmark96.2%SWE-bench
PAVE overall—%Level 1-4
Benchmarks29 / 42Evaluated
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Score by domain

Verification
73.8%
Rank #6 of 33
Document QA
76.3%
Rank #7 of 45
Numerical
75.3%
Rank #13 of 32
Forensic
56.2%
Rank #25 of 45
Multi-domain
Not evaluated
No data
Agent Tasks
52.5%
Rank #15 of 44
Performance profile
80%Verification73.8%Document QA76.3%Numerical75.3%Forensic56.2%Agent Tasks52.5%
Benchmark results29 evaluated · 13 pending
BenchmarkScoreRankTierWeightSourceDate
Pave Interchange Fee Benchmark
VerificationForensic
——Tier 130FB 2026Pending
FinanceBench
Document QA
——Tier 220FB 2026Pending
FinBen
Multi-domain
——Tier 310FB 2026Pending
FinQA
Numerical
——Tier 220FB 2026Pending
ConvFinQA
Document QA
——Tier 220FB 2026Pending
Finance Agent Benchmark
Agent Tasks
53.8#21 / 44Tier 130FB 20262026-09
MultiHiertt
Numerical
——Tier 310FB 2026Pending
FinAuditing
ForensicCompliance
——Tier 310FB 2026Pending
VALS Index
VerificationNumericalAgent Tasks
63.7#3 / 22Tier 125FB 20262026-07
MortgageTax Benchmark
NumericalForensic
67.3#12 / 22Tier 220FB 20262026-07
TaxEval v2
VerificationForensic
74.8#16 / 24Tier 220FB 20262026-07
Code Migration
Agent Tasks
52.9#3 / 23Tier 310FB 20262026-07
CyberBench
Forensic
88.1#1 / 11Tier 310FB 20262026-07
Excel Modeling Benchmark
Document QAForensic
72.3#9 / 44Tier 310FB 20262026-09
Legal Research Bench
Document QAForensic
48.1#3 / 22Tier 310FB 20262026-07
MedCode
Verification
44.0#8 / 20Tier 310FB 20262026-07
MedScribe
Document QA
85.2#9 / 20Tier 310FB 20262026-07
ProofBench v1.1
NumericalVerification
83.0#4 / 13Tier 310FB 20262026-07
SAGE
Agent Tasks
52.6#2 / 17Tier 310FB 20262026-07
Public Benefits Bench
VerificationForensic
66.5#7 / 16Tier 310FB 20262026-07
Vibe Code Bench v1.1
Agent Tasks
80.5#6 / 23Tier 310FB 20262026-07
Harvey's Legal Agent
Agent TasksForensic
2.5#14 / 22Tier 310FB 20262026-07
GPQA Diamond
NumericalVerification
95.2#1 / 20Tier 215FB 20262026-07
IOI
Numerical
86.7#2 / 8Tier 310FB 20262026-07
LiveCodeBench
Agent Tasks
82.6#15 / 19Tier 310FB 20262026-07
LegalBench
Document QAForensic
87.0#2 / 21Tier 310FB 20262026-07
MMLU Pro
NumericalVerification
89.1#5 / 21Tier 215FB 20262026-07
MMMU
Document QANumerical
88.8#3 / 14Tier 310FB 20262026-07
ProgramBench
Agent Tasks
1.5#4 / 17Tier 310FB 20262026-07
SkillsBench
Agent Tasks
54.1#8 / 17Tier 310FB 20262026-07
SWE-bench
Agent Tasks
96.2#3 / 22Tier 220FB 20262026-07
Terminal-Bench 2.1
Agent Tasks
85.8#1 / 23Tier 310FB 20262026-07
RSI Index
Agent TasksNumerical
28.4#2 / 3Tier 310FB 20262026-07
Time Horizon Index
ForensicAgent Tasks
13.0#2 / 5Tier 310FB 20262026-07
ReverseEngBench
Forensic
30.5#1 / 4Tier 310FB 20262026-07
Tax Agent Bench
ForensicAgent Tasks
68.0#1 / 25Tier 310FB 20262026-09
Big Finance Bench
ForensicDocument QA
——Tier 310FB 2026Pending
GDPval-MM
Document QANumerical
——Tier 310FB 2026Pending
BankerToolBench
Agent Tasks
——Tier 310FB 2026Pending
GDPval-Rubrics
Forensic
——Tier 310FB 2026Pending
PRBench-Finance
NumericalForensic
——Tier 310FB 2026Pending
CorpFin
ForensicVerification
——Tier 220FB 2026Pending
Contents.md
Model info
OrganisationOpenAI
Release date2026-07-09
LicenseProprietary
Context window1M tokens
Open weightNo
FB Score breakdown
Finance Agent×30 = 16.1
VALS Index×25 = 15.9
MortgageTax×20 = 13.5
TaxEval v2×20 = 15.0
Code Migration×10 = 5.3
CyberBench×10 = 8.8
EMB×10 = 7.2
Legal Research×10 = 4.8
MedCode×10 = 4.4
MedScribe×10 = 8.5
ProofBench×10 = 8.3
SAGE×10 = 5.3
Public Benefits×10 = 6.7
Vibe Code Bench×10 = 8.1
Harvey Legal×10 = 0.3
GPQA Diamond×15 = 14.3
IOI×10 = 8.7
LiveCodeBench×10 = 8.3
LegalBench×10 = 8.7
MMLU Pro×15 = 13.4
MMMU×10 = 8.9
ProgramBench×10 = 0.1
SkillsBench×10 = 5.4
SWE-bench×20 = 19.2
Terminal-Bench×10 = 8.6
RSI Index×10 = 2.8
Time Horizon×10 = 1.3
ReverseEngBench×10 = 3.1
Tax Agent×10 = 6.8
FB Score (weighted avg)65.1
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Compare vs Claude Opus 4.7 in full →
Evaluation notes
Scores reflect median of 3 runs per task at temperature 0.0 with 0-shot prompting. PAVE evaluation conducted by FinanceBenchmark. Other scores sourced from latest published arXiv papers.