GPT-5.1 on Humanity's Last Exam No tools

BENCHMARK RECORD: BR-00151-003

Canonical URL: https://www.benchmarkregistry.org/records/BR-00151-003

Benchmark scores may depend on benchmark version, evaluation configuration, model snapshot, and evaluator. Records sharing a benchmark name are not necessarily directly comparable.

Record

Record Identifier

BR-00151-003

Record Status

ACTIVE

Created At

2026-07-13T06:03:39.816Z

Updated At

2026-07-13T06:03:39.816Z

Superseded By

Not applicable

Model

Official Model Name

GPT-5.1

Model Identifier

OPNAI-51

Organization

OpenAI

Model Family

GPT

Model Number

51

Tier

Unknown

Model Snapshot

Unknown

Snapshot Label

Unknown

Provider Model Identifier

Unknown

Snapshot Date

Unknown

Benchmark

Benchmark Family

Humanity's Last Exam

Benchmark Version or Variant

No tools

Benchmark Version Reference

humanitys-last-exam/no-tools

Benchmark Organization

Center for AI Safety

Benchmark Status

ACTIVE

Result

Metric

Overall

Score

26.5%

Numeric Score

26.5

Evaluation Date

Unknown

Reported Date

2026-07-13

Evaluation Context

Configuration Reference

CFG-000003

Shots

Unknown

Reasoning Mode

Unknown

Reasoning Effort

high

Pass Count

Unknown

Agent Scaffold

Unknown

Evaluation Harness

Unknown

Temperature

Unknown

Top P

Unknown

Max Output Tokens

Unknown

System Prompt Description

Unknown

Additional Configuration

None reported

Source and Reporting

Primary Source

Artificial Analysis Model Leaderboard ↗

Source Type

LEADERBOARD

Publisher

Artificial Analysis

Source Published Date

Unknown

Source Accessed At

2026-07-13T04:53:32.160Z

Report Type

INDEPENDENT

Evaluator

Artificial Analysis

Evaluator Type

INDEPENDENT_ORGANIZATION

Provenance

Record Status

This record is ACTIVE. Registry identifiers remain reserved when record status changes.