Kimi K2 Instruct vs LongCat Flash Lite
Wins 5 of 6 areas
Coding · Agents · Reasoning · Facts · Long documents
Wins 1 of 6 areas
Following instructions
Kimi K2 Instruct is the stronger all-rounder.LongCat Flash Lite is better at following instructions.
Scores updated · 23 tests both models report · How we compare
Where each one wins
Tests won in each of the six 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.
- CodingWriting and fixing software40Kimi K2 Instruct4 of 4 tests
- FactsGetting facts right instead of making them up20Kimi K2 Instruct2 of 2 tests
- ReasoningHard problems that need careful thinking10Kimi K2 Instruct1 of 3 tests · 2 ties
- AgentsCarrying out multi-step tasks on its own10Kimi K2 Instruct1 of 1 test
- Long documentsFinding answers in very long texts10Kimi K2 Instruct1 of 1 test
- Following instructionsDoing exactly what it is asked01LongCat Flash Lite1 of 1 test
Agents, long documents and following instructions 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.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where Kimi K2 Instruct pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+26.5points ahead
- Reasons across sets of long documentsAA-LCR+24.7points ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+13.1points ahead
Where LongCat Flash Lite pulls ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+1.4points ahead
Every test, side by side
All 23 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingKimi K2 Instruct
- Terminal-Bench HardKimi K2 Instruct by 12.923.510.6+12.9
- SWE-bench VerifiedKimi K2 Instruct by 11.465.854.4+11.4
- SWE-bench MultilingualKimi K2 Instruct by 9.247.338.1+9.2
- SciCodeKimi K2 Instruct by 2.330.728.4+2.3
ReasoningKimi K2 Instruct
- GPQA DiamondKimi K2 Instruct by 13.176.763.6+13.1
- Humanity's Last Examtie6.45.8tie
- CritPttie00tie
FactsKimi K2 Instruct
- AA-Omniscience · Non-hallucinationKimi K2 Instruct by 26.530.33.8+26.5
- AA-Omniscience · AccuracyKimi K2 Instruct by 12.125.413.3+12.1
Following instructionsLongCat Flash Lite
- IFBenchLongCat Flash Lite by 1.441.743.1+1.4
Other results11 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 K2 Instruct by 43.5-26.6-70.1+43.5
- AIME 2025LongCat Flash Lite by 13.749.563.2+13.7
- Artificial Analysis Coding IndexKimi K2 Instruct by 9.425.916.5+9.4
- τ²-Bench Telecom (AA run)LongCat Flash Lite by 6.173.479.5+6.1
- AA IntelligenceKimi K2 Instruct by 3.815.311.5+3.8
- Terminal-BenchLongCat Flash Lite by 3.83033.8+3.8
- MMLU-ProKimi K2 Instruct by 2.881.178.3+2.8
- τ²-Bench (Retail)LongCat Flash Lite by 2.570.673.1+2.5
- Tau2 airlineLongCat Flash Lite by 1.556.558+1.5
- AA Agentic IndexLongCat Flash Lite by 1.137.738.8+1.1
- MATH-500 (EM)tie97.496.8tie
Questions people ask
Which is better, Kimi K2 Instruct or LongCat Flash Lite?
Kimi K2 Instruct wins five of the six areas where both have results: coding, agents, reasoning, facts and long documents. LongCat Flash Lite wins following instructions.
Which is better for coding?
Kimi K2 Instruct. It wins 4 of the 4 coding tests both models report; LongCat Flash Lite wins none.
How do you compare the two?
We use the 23 benchmark tests both models have published scores on. The verdict counts the 12 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 11 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.