Kimi K3 vs Step 3.7 Flash
Wins 7 of 7 areas
Coding · Agents · Reasoning · Facts · Images and charts · Math · Long documents
Wins 0 of 7 areas
—
Kimi K3 is the stronger all-rounder.Step 3.7 Flash is cheaper.
Scores updated · 19 tests both models report · How we compare
Where each one wins
Tests won in each of the seven areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- AgentsCarrying out multi-step tasks on its own40Kimi K34 of 4 tests
- ReasoningHard problems that need careful thinking30Kimi K33 of 3 tests
- CodingWriting and fixing software20Kimi K32 of 2 tests
- FactsGetting facts right instead of making them up20Kimi K32 of 2 tests
- MathCompetition and research-level math20Kimi K32 of 2 tests
- Images and chartsUnderstanding pictures, charts and video10Kimi K31 of 1 test
- Long documentsFinding answers in very long texts10Kimi K31 of 1 test
Images and charts and long documents rest on a single test each.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
Step 3.7 Flash costs 93% less for the same work.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where Kimi K3 pulls ahead
- Command-line tasks in a real terminalTerminal-Bench 2.1+45.7points ahead
- Customer-service tasks in a simulated bankτ-Bench V3 · Banking+34points ahead
- Real work tasks from 44 professionsGDPVal+33.7points ahead
Where Step 3.7 Flash pulls ahead
No clear win on a test scored out of 100.
Every test, side by side
All 19 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingKimi K3
- Terminal-Bench 2.1Kimi K3 by 45.78539.3+45.7
- SciCodeKimi K3 by 15.659.543.9+15.6
AgentsKimi K3
- τ-Bench V3 · BankingKimi K3 by 344612+34
- GDPValKimi K3 by 33.751.718+33.7
- AA ApexAgentsKimi K3 by 26.541.314.8+26.5
- AA IT-Bench SREKimi K3 by 17.447.730.3+17.4
ReasoningKimi K3
- Humanity's Last ExamKimi K3 by 25.546.921.4+25.5
- CritPtKimi K3 by 21.123.42.3+21.1
- GPQA DiamondKimi K3 by 12.693.580.9+12.6
FactsKimi K3
- AA-Omniscience · Non-hallucinationKimi K3 by 31.846.815+31.8
- AA-Omniscience · AccuracyKimi K3 by 21.847.625.8+21.8
Other results4 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- AA-OmniscienceKimi K3 by 5719.7-37.3+57
- Artificial Analysis Coding IndexKimi K3 by 36.676.239.6+36.6
- AA Agentic IndexKimi K3 by 28.950.621.7+28.9
- AA IntelligenceKimi K3 by 24.143.619.5+24.1
Questions people ask
Which is better, Kimi K3 or Step 3.7 Flash?
Kimi K3 wins all seven areas where both have results: coding, agents, reasoning, facts, images and charts, math and long documents. Step 3.7 Flash wins none, but costs 93% less.
Which is better for coding?
Kimi K3. It wins 2 of the 2 coding tests both models report; Step 3.7 Flash wins none.
Which is cheaper?
Kimi K3 costs $3.00 per million input tokens and $15.00 per million output tokens; Step 3.7 Flash costs $0.20 and $1.15. That makes Step 3.7 Flash about 93% cheaper for the same work.
How do you compare the two?
We use the 19 benchmark tests both models have published scores on. The verdict counts the 15 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 4 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.