The Known Good Updated 8 Sep 2026 Subscribe
MoonshotAI: Kimi K2.6 vs OpenAI: gpt-oss-120b ·Moonshot AI vs OpenAI

MoonshotAI: Kimi K2.6 vs OpenAI: gpt-oss-120b — head-to-head comparison

MoonshotAI: Kimi K2.6 profile OpenAI: gpt-oss-120b profile All comparisons
MoonshotAI: Kimi K2.6 — Moonshot AI
Quality
#8 of 65
92based on 3 of 7 evaluations
Known Good Index
Speed
#158 of 341
52.8
Output tokens per second
Price
#296 of 450
$1.71
Blended per 1M tokens
In $0.95 · Out $4.00
Cache hit price
#227 of 344
$0.16
per 1M tokens (−83%)
Context
#271 of 487
262k
tokens (~400 pages)
OpenAI: gpt-oss-120b — OpenAI
Quality
#44 of 65
62based on 3 of 7 evaluations
Known Good Index
Speed
#10 of 341
166.1
Output tokens per second
Price
#19 of 450
$0.07
Blended per 1M tokens
In $0.04 · Out $0.17
Cache hit price
unranked
per 1M tokens
Context
#372 of 487
131k
tokens (~200 pages)
Summary

On the Known Good Index, MoonshotAI: Kimi K2.6 scores 92 and OpenAI: gpt-oss-120b scores 62 — a 31-point lead for MoonshotAI: Kimi K2.6. They share 2 published evaluations, with MoonshotAI: Kimi K2.6 ahead on 2 and OpenAI: gpt-oss-120b ahead on 0.

Blended pricing is $1.71 per 1M tokens for MoonshotAI: Kimi K2.6 and $0.07 for OpenAI: gpt-oss-120b — OpenAI: gpt-oss-120b is about 24.4× cheaper.

Throughput is 53 tokens per second for MoonshotAI: Kimi K2.6 and 166 for OpenAI: gpt-oss-120b, with time to first token at 1.4s and 0.7s. MoonshotAI: Kimi K2.6 accepts 262k tokens of context against 131k.

MoonshotAI: Kimi K2.6 is open weights under Open weights (unrestricted); OpenAI: gpt-oss-120b is open weights under Open weights (unrestricted). 32 tracked hosts serve one or both, and 9 serve both.

Generated from tracked data on 9 Sep 2026 · how these comparisons are computed →

At a glance
MetricMoonshotAI: Kimi K2.6OpenAI: gpt-oss-120b
Known Good Index 92 based on 3 of 7 evaluations 62 based on 3 of 7 evaluations
Blended $/1M $1.71 $0.07
Output tok/s 53 166
Context window 262k 131k
Providers 23 18
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Quality

Known Good Index and the capability indices, side by side

Index scores

Each index is min-max normalised across tracked models and scaled 0–100 from published evaluations. We do not run these evaluations.

MetricMoonshotAI: Kimi K2.6OpenAI: gpt-oss-120b
Known Good Index 92 62
Openness Index 60 60
The Known Good

Quality Breakdown

Every evaluation both models report a published score for

Evaluations both models report

Bar = MoonshotAI: Kimi K2.6 · marker = OpenAI: gpt-oss-120b · scores ingested from Epoch AI (CC-BY 4.0)

GPQA Diamond91 / 76
Mock AIME 2024–2596 / 89

Right-hand figures read MoonshotAI: Kimi K2.6 / OpenAI: gpt-oss-120b. MoonshotAI: Kimi K2.6 leads on 2 of 2, OpenAI: gpt-oss-120b on 0.

The Known Good

Arena Elo

Human preference rating from blind pairwise votes

Arena ratings

Elo from blind pairwise votes, ingested from Arena. Higher is better.

MetricMoonshotAI: Kimi K2.6OpenAI: gpt-oss-120b
Text Arena 1,455 1,366
Text Arena (style controlled) 1,461 1,352
The Known Good

Price & Cost

Published API pricing by token type

Published pricing

USD per 1M tokens. Blended is a 3:1 input:output mix. Live from OpenRouter, cross-checked against models.dev. Lower is better.

MetricMoonshotAI: Kimi K2.6OpenAI: gpt-oss-120b
Input $/1M $0.95 $0.04
Output $/1M $4.00 $0.17
Blended $/1M $1.71 $0.07
Cache read $/1M $0.160
The Known Good
We publish blended price rather than cost-per-task. Cost-per-task requires token counts from an evaluation suite we do not run. Blended price is computed from published rates and is fully reproducible — see the pricing methodology.

Context Window

Maximum input accepted and maximum output emitted

Context and output limits

Provider-declared limits, from metadata via models.dev and OpenRouter. Higher is better.

MetricMoonshotAI: Kimi K2.6OpenAI: gpt-oss-120b
Context window 262k 131k
Max output tokens 236k 118k
The Known Good

Speed & Latency

Mean throughput and time to first token across hosting providers, over successful measurements from the last 48 hours

Throughput and latency

Means across all tracked providers over successful measurements from the last 48 hours, derived from OpenRouter endpoint telemetry.

MetricMoonshotAI: Kimi K2.6OpenAI: gpt-oss-120b
Output tokens/s 53 166
Time to first token 1.4s 0.7s
The Known Good

Providers

Which hosts serve each model, and at what price and speed

32 hosts · 9 serve both
Full provider benchmarks →
Provider MoonshotAI: Kimi K2.6 blendedMoonshotAI: Kimi K2.6 tok/s OpenAI: gpt-oss-120b blendedOpenAI: gpt-oss-120b tok/s
CoreWeave $1.34 245 $0.07 45
Parasail $1.44 124 $0.26 96
Together $2.02 119 $0.26 84
ModelRun $1.38 103
Decart $1.06 98
Baidu · first party $1.71 69
Fireworks $1.71 68
Inceptron $1.18 67
DigitalOcean $1.71 42 $0.14 29
Novita $1.45 41 $0.10 61
Cloudflare $1.71 39
Crusoe $1.40 37
Phala $1.97 37 $0.26 67
Moonshot AI · first party $1.71 35
SiliconFlow $1.43 34 $0.15 10
Sail Research $1.75 33
StreamLake $1.08 33
AtlasCloud $1.71 28
BaseTen $1.71 23 $0.20 224
Chutes $1.28 21
Venice $1.44 19
DeepInfra $1.44 18 $0.07 105
GMICloud $1.54 17
Cerebras $0.45 833
Groq $0.26 304
Amazon Bedrock · first party $0.26 288
Nebius $0.26 281
Google · first party $0.16 196
SambaNova $0.34 183
Mara $0.30 120
Mancer 2 $0.17 54
AkashML $0.07 50

Per-host pricing and telemetry from OpenRouter. A dash means that host does not serve that model.

The Known Good
Sources for this page
Pricing & providers — OpenRouter Metadata — models.dev Benchmarks — Epoch AI (CC-BY 4.0)Elo — Arena Full attribution →