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Ternary Bonsai 2 27B vs Step 3.7 Flash

Ternary Bonsai 2 27B costs 2.3x less per output token than Step 3.7 Flash ($0.50 vs $1.15 per million). Updated October 22, 2026; no benchmark has tested both models yet.

Replace Ternary Bonsai 2 27B Replace Step 3.7 Flash
P Ternary Bonsai 2 27BPrism-ml
Coding
No data
Overall
No data
Output $/M
$0.50
Step 3.7 FlashStepFun
Coding
No data
Overall
No data
Output $/M
$1.15
vs $0.50 vs $1.15 per 1M output tokens. Ternary Bonsai 2 27B is 2.3x cheaper.

Ternary Bonsai 2 27B or Step 3.7 Flash: which to pick

Neither model has a coding score yet, so the two cannot be ranked on coding.

Pick Ternary Bonsai 2 27B for output tokens 2.3x cheaper ($0.50 vs $1.15 per million).

Model ATernary Bonsai 2 27BPrism-mlNot benchmarkedNo coding benchmarkNo cost per solved taskModel BStep 3.7 FlashStepFunNot benchmarkedNo coding benchmarkNo cost per solved task

No benchmark has tested both yet. Ternary Bonsai 2 27B has none yet; Step 3.7 Flash on AA Coding Index, SciCode and Terminal-Bench Hard (Artificial Analysis run). Compare them on price and context instead.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

At a glance

Coding index
Ternary Bonsai 2 27B not benchmarked, Step 3.7 Flash not benchmarked.
Widest category
None yet: no category has been tested on both models.
Widest single gap
None yet: no benchmark has tested both models.
Output price
Ternary Bonsai 2 27B $0.50 against Step 3.7 Flash $1.15 per million output tokens, 2.3x apart.
Context window
Both take 262K tokens.

Benchmark by benchmark

Every board either model has a result on, a category to a fold; bars are each result on a 0 to 100 scale. Only one model is measured on each, so no row names a leader.

CodingDirectional onlySix of these boards feed the Vibe Coding Index4 boards measured
Coding benchmarks for Ternary Bonsai 2 27B and Step 3.7 Flash
BenchmarkTernary Bonsai 2 27BStep 3.7 FlashLeader
AA Coding IndexNot measured39.6Only Step 3.7 Flash measured
SciCodeNot measured43.9%Only Step 3.7 Flash measured
Terminal-Bench Hard (Artificial Analysis run)Not measured35.6%Only Step 3.7 Flash measured
ALE-BenchNot measured694.1Only Step 3.7 Flash measured
Neither model has a result on the other 35 boards here
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
Intelligence benchmarks for Ternary Bonsai 2 27B and Step 3.7 Flash
BenchmarkTernary Bonsai 2 27BStep 3.7 FlashLeader
AA Intelligence IndexNot measured19.5Only Step 3.7 Flash measured
Neither model has a result on the other 1 board here
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
Agentic work benchmarks for Ternary Bonsai 2 27B and Step 3.7 Flash
BenchmarkTernary Bonsai 2 27BStep 3.7 FlashLeader
τ²-Bench TelecomNot measured98.5%Only Step 3.7 Flash measured
Neither model has a result on the other 40 boards here
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index2 boards measured
Reasoning benchmarks for Ternary Bonsai 2 27B and Step 3.7 Flash
BenchmarkTernary Bonsai 2 27BStep 3.7 FlashLeader
GPQA Diamond (Artificial Analysis run)Not measured80.9%Only Step 3.7 Flash measured
Humanity's Last Exam (Artificial Analysis run)Not measured21.4%Only Step 3.7 Flash measured
Neither model has a result on the other 20 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards measured
Web design benchmarks for Ternary Bonsai 2 27B and Step 3.7 Flash
BenchmarkTernary Bonsai 2 27BStep 3.7 FlashLeader
Design Arena: websitesNot measured1196Only Step 3.7 Flash measured
Design Arena: UI componentsNot measured1177Only Step 3.7 Flash measured
Design Arena: game devNot measured1158Only Step 3.7 Flash measured
Design Arena: data vizNot measured1173Only Step 3.7 Flash measured
Design Arena: 3DNot measured1129Only Step 3.7 Flash measured
Design Arena: all code categoriesNot measured1182Only Step 3.7 Flash measured
Design Arena: SVGNot measured1084Only Step 3.7 Flash measured
Design Arena: ASCII artNot measured1152Only Step 3.7 Flash measured
Neither model has a result on the other 1 board here
GeneralDirectional onlyPublic boards, shown as published, kept out of the index2 boards measured
General benchmarks for Ternary Bonsai 2 27B and Step 3.7 Flash
BenchmarkTernary Bonsai 2 27BStep 3.7 FlashLeader
IFBenchNot measured67.3%Only Step 3.7 Flash measured
Long context reasoning (AA-LCR)Not measured73.7%Only Step 3.7 Flash measured
Neither model has a result on the other 44 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

Ternary Bonsai 2 27B$0.0003Fits in one request
Step 3.7 Flash$0.0008Fits in one request

Ternary Bonsai 2 27B costs less

Repository review

50K input + 3K output tokens

Ternary Bonsai 2 27B$0.0053Fits in one request
Step 3.7 Flash$0.013Fits in one request

Ternary Bonsai 2 27B costs less

Agent loop

200K input + 10K output tokens

Ternary Bonsai 2 27B$0.020Fits in one request
Step 3.7 Flash$0.051Fits in one request

Ternary Bonsai 2 27B costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of Ternary Bonsai 2 27B and Step 3.7 Flash
SpecificationPrismML Ternary Bonsai 2 27BStepFun Step 3.7 Flash
MakerPrism-mlStepFun
WeightsOpen weightsOpen weights
ReleasedSeptember 18, 2026May 28, 2026
Context window262K262K
Input $/Mtok$0.075$0.20
Output $/Mtok$0.50$1.15
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it00
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Ternary Bonsai 2 27B better than Step 3.7 Flash for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Pick Ternary Bonsai 2 27B for output tokens 2.3x cheaper ($0.50 vs $1.15 per million).

Which is cheaper, Ternary Bonsai 2 27B or Step 3.7 Flash?

Ternary Bonsai 2 27B costs $0.075 per million input tokens and $0.50 per million output tokens; Step 3.7 Flash costs $0.20 and $1.15. Cost per solved task is known for neither of them.

Which has the bigger context window, Ternary Bonsai 2 27B or Step 3.7 Flash?

Neither: both take 262K tokens.

Has any benchmark tested both Ternary Bonsai 2 27B and Step 3.7 Flash?

No benchmark has tested both yet. Ternary Bonsai 2 27B has none yet; Step 3.7 Flash on AA Coding Index, SciCode and Terminal-Bench Hard (Artificial Analysis run). Compare them on price and context instead. Data as of October 22, 2026.

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