We build the data that pushes the frontier

Snorkel helps frontier labs and AI teams develop specialized training data and environments that set their models and agents apart.

Proud to partner with top frontier AI and research teams

Frontier models break at the edges. We build for that.

Most data pipelines are built for volume, not difficulty. Frontier models fail on distributional gaps in specialized domains, benchmark blind spots, and tasks where correctness is hard to define. Snorkel is built specifically for these problems.

Founded out of Stanford AI Lab, we've been shaping and benchmarking frontier AI for nearly a decade.

Leaderboards
Knowledge Work

Agents’ Last Exam V1.1

Evaluating AI agents on long-horizon, economically valuable professional workflows with verifiable outcomes.

By Pass Rate
1
Gemini 4 Carbon
45.9%
2
Kimi 3.1 Pro
43.4%
3
Opus 5.5
43.4%
4
GPT-6 Astra
42.6%
5
GPT-6.1 Terra
41.8%
Computer Use

OSWorld 2.0

Evaluates computer-use agents on 108 long-horizon workflows.

By Binary Accuracy (500 steps)
1
Opus 5 · max
44.33%
2
Muse Spark 1.3 · max
39.25%
3
Opus 5 · high
36.89%
4
Opus 5 · xhigh
33.33%
5
Opus 5 · medium
33.01%
Agentic Coding

Terminal-Bench 4.1

Evaluates terminal agents on continuously updated software-engineering tasks.

By Resolution Rate
1
Opus 5.5
65.8%
2
Sonnet 5.5
63.9%
3
GPT-6.1 Sol
60.9%
4
GPT-6 Astra
60.3%
5
Fable 5.1
57.6%
Agentic Coding

Terminal-Bench 4.0

Evaluates terminal agents on continuously updated software-engineering tasks.

By Resolution Rate
1
Opus 5.5
64.8%
2
Sonnet 5.5
61.8%
3
GPT-6 Astra
58.2%
4
GPT-6 Sol
58.2%
5
Fable 5.1
57.9%
Agentic Coding

Agentic Coding 2.0

Evaluating whether coding agents can plan, execute, verify, and recover across complex terminal-native engineering tasks.

By pass@1
1
GPT-6 Astra
47.6%
2
Muse Wonder
43.6%
3
GPT-6.1 Sol
42.8%
4
Gemini 4 Argon
41.8%
5
Opus 5.5
40.4%
Software Engineering

Senior SWE-bench

Evaluates coding agents on senior-level software engineering tasks.

Tasteful Solve Rate
Consistent reward hacking (e.g. copying fixes from newer PyPI/npm releases) detected, 5 tasks removed from score
Opus 5.5
39.3%
2
GPT-6 Astra
36.8%
3
Fable 5.1
34.7%
4
Fable 5
34.7%
5
Opus 5
34.7%
Knowledge Work

WorkplaceAgents

Evaluates AI agents on economically valuable professional work and verifiable workplace deliverables.

By pass@1
1
Gemini 4 Argon
21.2%
2
Muse Wonder
17.4%
3
Grok 4.6
17.1%
4
Fable 5.1
15.8%
5
Grok 4.7
15.2%
Software Engineering

SlopCode Bench

Measures coding-agent performance across evolving software requirements.

By Iso Solve
1
GPT-5.5
28.06%
2
GPT-5.3
26.02%
3
GPT-5.4
23.47%
4
GPT 5.2
21.94%
5
Opus 4.6
20.92%
Enterprise Environments

SnorkelRevOps

Evaluates revenue-operations workflows involving systems, controls, and business-state updates.

By pass@1
1
Gemini 4 Argon
18.4%
2
Muse Wonder
18.0%
3
Grok 4.6
15.8%
4
Fable 5.1
14.0%
5
Kimi K3
13.1%
Capability/Efficiency

Continual Learning Bench

Measures improvement across sequential, stateful tasks.

By Agg. Reward
1
Sonnet 4.6
+0.196
2
GPT-5.4
+0.189
3
Sonnet 4.6
+0.185
4
Opus 4.7
+0.183
5
GPT 5.4
+0.148
Enterprise Environments

SnorkelManufacturing

Evaluates manufacturing decisions using fragmented plant-floor, engineering, and supplier evidence.

By pass@1
1
Muse Wonder
27.8%
2
GPT-6.1 Sol
19.6%
3
Gemini 4 Argon
19.5%
4
Grok 4.6
16.4%
5
Grok 4.7
12.1%
Enterprise Environments

SnorkelFinance 2.0

Evaluates financial workflows requiring evidence gathering, analysis, and compliance.

By pass@1
1
Grok 4.6
25.1%
2
GLM 5.3
21.2%
3
Grok 4.7
20.2%
4
Fable 5.1
19.6%
5
Opus 5.5
18.6%
Agentic Coding

Terminal-Bench 3.0

Evaluates terminal agents on containerized tasks across seven domains.

By Resolution Rate
1
Opus 5
42.7%
2
GPT-5.6 Sol
34.6%
3
Fable 5
34.1%
4
GLM 5.3
32.4%
5
Grok 4.6
26.5%
Software Engineering

SWE-bench CLI

Evaluates validated multi-file code changes in open-source repositories.

By pass@1
1
Opus 5.5
16.6%
2
Gemini 4 Argon
16.3%
3
Fable 5.1
14.5%
4
Opus 5
14.0%
5
GPT-6 Astra
12.4%
Enterprise Environments

SnorkelLegal

Evaluates legal workflows requiring evidence, procedure, authority, and action.

By pass@1
1
Gemini 4 Argon
46.0%
2
Grok 4.6
40.7%
3
Muse Wonder
38.3%
4
GLM 5.3
37.8%
5
Muse Spark 1.3
36.5%
Science & Research

Terminal-Bench-Science

Evaluates agents on scientific workflows derived from researchers’ own work.

By Resolution Rate
1
GPT-6 Astra
68.1%
2
Opus 5.5
63.3%
3
Fable 5.1
40.0%
4
Opus 5
30.0%
5
Fable 5
21.4%
Knowledge Work

MBABench 2.0

Evaluates agents on building financial models in spreadsheets, across 101 expert-written tasks.

By pass rate
1
Astra (Codex)
15.8%
2
Fable 5.1 (Claude Code)
7.9%
3
Astra (ChatGPT)
7.9%
4
Fable 5.1 (Claude Cowork)
5.0%
5
Opus 5 (Claude Code)
4.0%
Enterprise Environments

SnorkelUnderwrite 2.0

Evaluates auditable insurance underwriting decisions using incomplete, distributed evidence.

By pass@1
1
Grok 4.7
30.5%
2
GLM 5.3
30.4%
3
Nemotron 3 Ultra 550B
30.0%
4
DeepSeek V4 Pro
28.5%
5
Kimi K3
27.9%
Software Engineering

LibraryDesignBench

Measures how well AI agents design libraries that other agents can use.

Pass Rate
1
Opus 5.5
48.9%
2
Fable 5.1
47.5%
3
GPT-6 Astra (mini-SWE)
45.1%
4
GPT-6 Astra (Codex)
44.1%
5
Kimi K3
44.0%
of
The Frontier AI Data Lab

Data development for the frontier

Snorkel partners with frontier AI teams to build research-grade datasets, evaluation systems, and runnable environments where generic coverage runs out.

Snorkel Data Series

Curriculum-structured datasets for the task areas frontier models are pushing hardest, with rubrics, reviewer guidance, difficulty tiers, and eval slices built in.

Custom data development

When off-the-shelf coverage runs out, we build bespoke datasets, evals, and benchmark expansions for the exact failure surface you need to close.

Specialized agents

Custom agents built on specialized data and evaluated in real workflows, with pass/fail criteria tied to the performance standards that moves ROI.
Data

Expert demonstrations & reasoning

Human solution traces
Reasoning traces
SME Q&A rationales
Workflow demos and decision workflows
Tool-use demos

Preference labels & rankings

Patch/draft/report quality ranking
Trajectory QA
Risk/safety/style calibration
Helpful/harmless ranking
Grounding & style

Rubrics & verifiable outcomes

Unit tests / compile
Deterministic graders
Citation correctness
Numerical consistency/scorable math/science
Long-horizon tasks
Environments

Standard & custom environments

Repo + CLI tools
Browser/GUI harness
Multi-step/stateful workflows
Simulated environments
Your tools, codebase, corpus, data & permissions
DATA DEVELOPMENT

Good data is a set of design choices

Most data quality problems are design problems. Ambiguous task definitions produce inconsistent labels. Uncalibrated reviewers introduce systematic bias. Missing provenance makes failure analysis guesswork. Snorkel's proprietary process is built around the decisions that determine whether training data actually drives model improvement:

Custom AGENTS

Specialized agents grounded in expert data

The same data development system we use to improve frontier models powers our specialized agents. That means agents evaluated against task-specific rubrics and programmatic checks — not generic benchmarks — and refined through the same adjudication and provenance practices used in production model development.

Built for specialized workflows and high-consequence decisions, not generic copilots
Evaluation on environment-grounded tasks with programmatic pass/fail criteria
Same rigor used to train frontier-class models, applied to your enterprise deployment
PUBLISHED RESEARCH

Research that shapes the work

Every dataset, benchmark, and environment we create is the output of active research co-developed and peer-reviewed with leading academic teams and frontier labs.

For models that need to be right. Not just good enough.