Model comparison

GPT-6.1 Sol vs Step 3.7 Flash

Step 3.7 Flash has enough public results to be ranked (#207); GPT-6.1 Sol does not yet, so treat this comparison as directional.

Last verified October 10, 2026. 0 shared benchmarks.

GPT-6.1 Sol OpenAI

42.1

Unranked Sparse

Step 3.7 Flash

StepFun

36.5

Rank #207 Reported

Summary

The widest gap is in coding, where GPT-6.1 Sol leads 51.4 to 39.4.
Step 3.7 Flash is cheaper at $0.18 / $1.11 per million input/output tokens, against $2 / $10 for GPT-6.1 Sol.
GPT-6.1 Sol accepts more context: 1.05M tokens versus 256K.
Step 3.7 Flash has downloadable open weights; the other is API-only.

Side by side

GPT-6.1 Sol and Step 3.7 Flash specifications
	GPT-6.1 Sol	Step 3.7 Flash
Provider	OpenAI	StepFun
Noometry Index	42.1	36.5
Released	2026-09-29	2026-05-29
Weights	Proprietary	Open
Context window	1.05M	256K
Max output	128K	256K
Input $ / M tokens	$2	$0.18
Output $ / M tokens	$10	$1.11
Results tracked	2	5

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Category by category

Coding GPT-6.1 Sol leads

GPT-6.1 Sol: 51.4, Step 3.7 Flash: 39.4 (#147)

Coding benchmarks
Benchmark	GPT-6.1 Sol	Step 3.7 Flash
DeepSWE	75.2%	—
SciCode	—	40%
ALE-Bench	—	694.12

Agentic & Tool Use Not comparable

GPT-6.1 Sol: 34.3, Step 3.7 Flash: —

Agentic & Tool Use benchmarks
Benchmark	GPT-6.1 Sol	Step 3.7 Flash
GDP.pdf	32%	—

Reasoning Not comparable

GPT-6.1 Sol: —, Step 3.7 Flash: 20.9 (#211)

Reasoning benchmarks
Benchmark	GPT-6.1 Sol	Step 3.7 Flash
NYT Connections (extended)	—	39.7%
CritPt	—	2.3%

Math Not comparable

GPT-6.1 Sol: —, Step 3.7 Flash: 40.9 (#74)

Math benchmarks
Benchmark	GPT-6.1 Sol	Step 3.7 Flash
MathArena Final-Answer Competitions	—	68.5%

Frequently asked questions

Is GPT-6.1 Sol better than Step 3.7 Flash?

Step 3.7 Flash has enough public results to be ranked (#207); GPT-6.1 Sol does not yet, so treat this comparison as directional.

Which is cheaper, GPT-6.1 Sol or Step 3.7 Flash?

Step 3.7 Flash is cheaper. It lists at $0.18 per million input tokens and $1.11 per million output tokens; GPT-6.1 Sol lists at $2 and $10.

Is GPT-6.1 Sol or Step 3.7 Flash better for coding?

GPT-6.1 Sol scores higher on coding benchmarks: 51.4 versus 39.4 in the Noometry coding category.

Which has the bigger context window?

GPT-6.1 Sol does, with 1.05M tokens against 256K.

How many benchmarks do GPT-6.1 Sol and Step 3.7 Flash share?

0 benchmarks have published results for both models. GPT-6.1 Sol has 2 scored results on Noometry and Step 3.7 Flash has 5.