Which is better, GPT-6.1 Sol or Kimi K3?

GPT-6.1 Sol scores higher on 7 of 9 shared quality measures, Kimi K3 on 0. 2 measures are too close to call. GPT-6.1 Sol costs about 33% less than Kimi K3 on a blended price of $4.00 against $6.00 per million tokens. Which one is better for you depends on your task and budget, so test both on your own work.

Which is cheaper, GPT-6.1 Sol or Kimi K3?

GPT-6.1 Sol is cheaper on blended price: $4.00 per million tokens for GPT-6.1 Sol against $6.00 for Kimi K3. For 100 chats of about 1,000 tokens in and 500 tokens back, that is about $0.70 for GPT-6.1 Sol and $1.05 for Kimi K3.

Which is better for coding, GPT-6.1 Sol or Kimi K3?

On Arena coding rating they are too close to call (1537 and 1539).

AI Rankings

GPT-6.1 Sol vs Kimi K3: Scores, Price and Which to Choose

Side by side on every measure both models share: overall score, human votes, tests, price and context window. Close results are called too close to call.

Data updated 26 Oct 2026

Read the model pages for the full picture: GPT-6.1 Sol and Kimi K3.

Side by side

A check mark shows the better side on each measure. Scores that are too close to call have no winner.

GPT-6.1 Sol compared with Kimi K3GPT-6.1 Sol against Kimi K3 on 11 measures. GPT-6.1 Sol is better on 8, Kimi K3 on 1, 2 are too close to call, 0 have no data for one side.

GPT-6.1 Sol
Kimi K3

Epoch Capabilities IndexGPT-6.1 Sol leads
Combined score over many tests. Bar shows where it sits between the lowest and highest score we track.
GPT-6.1 Sol:
Better: 168.4
Kimi K3:
157.9
Arena text ratingToo close to call
Rating from head-to-head votes by people. Bar shows where it sits between the lowest and highest score we track.
GPT-6.1 Sol:
1480
Kimi K3:
1487
Arena coding ratingToo close to call
Rating from head-to-head votes by people. Bar shows where it sits between the lowest and highest score we track.
GPT-6.1 Sol:
1537
Kimi K3:
1539
Arena web development ratingGPT-6.1 Sol leads
Rating from head-to-head votes by people. Bar shows where it sits between the lowest and highest score we track.
GPT-6.1 Sol:
Better: 1749
Kimi K3:
1655
ARC-AGI-2GPT-6.1 Sol leads
Visual puzzles where the AI must work out a new rule from a few examples and apply it.
GPT-6.1 Sol:
Better: 94.2%
Kimi K3:
60.4%
FrontierMath (Tiers 1-3)GPT-6.1 Sol leads
Original, very hard maths problems written by mathematicians.
GPT-6.1 Sol:
Better: 93.7%
Kimi K3:
72.2%
GPQA DiamondGPT-6.1 Sol leads
Very hard multiple-choice science questions in biology, physics and chemistry, written by experts and designed so a quick web search does not give the answer.
GPT-6.1 Sol:
Better: 95.4%
Kimi K3:
93.1%
OTIS Mock AIMEGPT-6.1 Sol leads
Maths competition problems in the style of the US AIME exam, from the 2024 and 2025 sets.
GPT-6.1 Sol:
Better: 100.0%
Kimi K3:
97.2%
SimpleQA VerifiedGPT-6.1 Sol leads
Short factual questions that each have one correct answer.
GPT-6.1 Sol:
Better: 73.9%
Kimi K3:
50.6%
Blended price per million tokensGPT-6.1 Sol costs less
Blended price: lower is better.
GPT-6.1 Sol:
Better: $4.00
Kimi K3:
$6.00
Context windowKimi K3 leads
How much text it can read at once.
GPT-6.1 Sol:
922K tokens
Kimi K3:
Better: 1M tokens

Data updated 26 Oct 2026. Only measures that both models have are shown.

The numbers

GPT-6.1 Sol against Kimi K3, measure by measure. A check mark shows the better side.
Measure	GPT-6.1 Sol	Kimi K3
Epoch Capabilities Index	168.4	157.9
Arena text ratingToo close to call	1480	1487
Arena coding ratingToo close to call	1537	1539
Arena web development rating	1749	1655
ARC-AGI-2	94.2%	60.4%
FrontierMath (Tiers 1-3)	93.7%	72.2%
GPQA Diamond	95.4%	93.1%
OTIS Mock AIME	100.0%	97.2%
SimpleQA Verified	73.9%	50.6%
Blended price per million tokens	$4.00	$6.00
Context window	922K tokens	1M tokens

What it costs in everyday terms

Estimate for 100 chats of about 1,000 tokens in and 500 tokens back, from list prices. Your bill depends on how you use it.

100 chats with GPT-6.1 Sol: $0.70; Blended price $4.00 per million tokens.
100 chats with Kimi K3: $1.05; Blended price $6.00 per million tokens.

Who should pick which

Pick GPT-6.1 Sol if these matter most

Epoch Capabilities Index: 168.4 against 157.9
Arena web development rating: 1749 against 1655
ARC-AGI-2: 94.2% against 60.4%
FrontierMath (Tiers 1-3): 93.7% against 72.2%
GPQA Diamond: 95.4% against 93.1%
OTIS Mock AIME: 100.0% against 97.2%
SimpleQA Verified: 73.9% against 50.6%
Blended price per million tokens: $4.00 against $6.00

Pick Kimi K3 if these matter most

Context window: 1M tokens against 922K tokens

Too close to call: Arena text rating, Arena coding rating.

Scores come from tests and votes, not from your own work. Try both on a task you care about before you commit.

Go deeper

GPT-6.1 Sol: full page

Kimi K3: full page

Questions about this comparison

Which is better, GPT-6.1 Sol or Kimi K3?: GPT-6.1 Sol scores higher on 7 of 9 shared quality measures, Kimi K3 on 0. 2 measures are too close to call. GPT-6.1 Sol costs about 33% less than Kimi K3 on a blended price of $4.00 against $6.00 per million tokens. Which one is better for you depends on your task and budget, so test both on your own work.
Which is cheaper, GPT-6.1 Sol or Kimi K3?: GPT-6.1 Sol is cheaper on blended price: $4.00 per million tokens for GPT-6.1 Sol against $6.00 for Kimi K3. For 100 chats of about 1,000 tokens in and 500 tokens back, that is about $0.70 for GPT-6.1 Sol and $1.05 for Kimi K3.
Which is better for coding, GPT-6.1 Sol or Kimi K3?: On Arena coding rating they are too close to call (1537 and 1539).

Where this data comes from

Epoch AI: Benchmark data: Epoch AI, 'Capabilities & benchmarking', epoch.ai/benchmarks (CC BY 4.0). We match models across sources, rank them and show them in charts. Scores are not changed. Epoch AI does not endorse this site.
Arena (formerly LMArena): Human-preference ratings: Arena (arena.ai) leaderboard dataset, CC BY 4.0. We keep the latest published ratings, match them to models from other sources and rank them. Ratings are not changed. Arena does not endorse this site.
LiteLLM model price list: Prices and context windows: LiteLLM model price list (github.com/BerriAI/litellm, MIT licence). We use the model maker's own price entry when there is one. Prices change often, so always confirm on the maker's site before you buy.

Newest data on this page: 26 Oct 2026. Prices are list prices and change often, so confirm on the maker's site before you buy. Sponsors never change a score or an order. How we calculate this · Report a mistake