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Measurement sources and verification status (11 fields)

Collected third-party figures are not independent tests. A source link and collection date do not establish reproducibility. Exact model version, dataset and test settings may be missing. No independent verification date is supplied.

speed: 160

latency: 0.28

contextWindow: 262144

inputPrice: 0.1

outputPrice: 0.3

benchmarkMmlu: 68

benchmarkHumanEval: 68

benchmarkMath: 64

benchmarkGpqa: 50

reasoningScore: 57

codingScore: 68

StepFun: Step 3.5 Flash

stepfun🔒 Proprietary

Published BenchLM leaderboard evidence.

LLM Stats Scores

57.0

Reasoning

68.0

Coding

🎯

50.0%GPQA Diamond — graduate-level science accuracy

Published benchmark evidence

Task scores are reported independently by each publisher; they are not combined into a hidden quality score.

View HLE source ↗

24.5%

Humanity's Last Exam

BenchLM performance measurements

Published output speed and first-token timing, kept separate from provider pricing and other benchmark sources.

View source ↗

Output speed

141

tokens / second

TTFT

17.49s

BenchLM measured

Collected 11/11/2026

Quality Score

63.0

Overall (0–100)

Speed

160 c/s

characters/second

Latency (TTFT)

0.28s

to first token

Input Price

$0.1

per 1M tokens

Output Price

$0.3

per 1M tokens

Context Window

262K

tokens

Release Date

2026-01-29

30-Day Rank History

📊 Benchmark Scores

Reported scores · % accuracy

What do these benchmarks test?

🎯

GPQA Diamond50.0%Below avg

Designed so that even PhD-level human experts average ~65–70%. A score above 80% signals near-expert scientific reasoning that goes far beyond memorisation.

🧠

MMLU68.0%Below avg

The classic academic breadth benchmark. Top frontier models now score above 85%, so it best distinguishes mid-tier from strong generalist models.

💻

HumanEval68.0%Below avg

Measures whether a model writes functionally correct code — not just plausible-looking syntax. Strong scores (>85%) indicate reliable day-to-day coding assistance.

∑

MATH Benchmark64.0%Solid

Tests multi-step mathematical reasoning under strict correctness. Even a 60% score requires strong chain-of-thought; top reasoning models now exceed 90%.