Kimi K3.1 Pro vs Solar Pro 4
Kimi K3.1 Pro leads the LLM Stats Score 55.5 to 33.9. Solar Pro 4 is 7.6x cheaper per token.
Moonshot AI · Upstage · Updated for 2026
Which is better?
Kimi K3.1 Pro leads the overall LLM Stats Score 55.5 to 33.9, ranking #5 overall.
In the 2 individual benchmarks reported for both models, Kimi K3.1 Pro wins 2; this is a narrower head-to-head signal than the composite indexes.
On price, Solar Pro 4 is roughly 7.6x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Kimi K3.1 Pro also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Kimi K3.1 Pro
- overall performance matters — it scores 55.5 and ranks #5 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 2 of 2 exact shared results
- you process long inputs — it offers a 1,048,576 token context window
- you want the most recent training data — it shipped Oct 2026
Choose Solar Pro 4
- cost matters — it's about 7.6x cheaper per token
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
30 reported for Kimi K3.1 Pro · 9 for Solar Pro 4
Kimi K3.1 Pro outperforms in 2 benchmarks (BrowseComp, GPQA), while Solar Pro 4 is better at 0 benchmarks.
Kimi K3.1 Pro significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Kimi K3.1 Pro ($2.00/1M tokens) is 6.7x more expensive than Solar Pro 4 ($0.30/1M tokens).
For output processing, Kimi K3.1 Pro ($10.00/1M tokens) is 8.3x more expensive than Solar Pro 4 ($1.20/1M tokens).
In conclusion, Kimi K3.1 Pro is more expensive than Solar Pro 4.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Kimi K3.1 Pro accepts 1,048,576 input tokens compared to Solar Pro 4's 524,288 tokens. Kimi K3.1 Pro can generate longer responses up to 1,048,576 tokens, while Solar Pro 4 is limited to 131,072 tokens.
Input capabilities
Documented input modalities across available providers
Kimi K3.1 Pro supports multimodal inputs, whereas Solar Pro 4 does not.
Kimi K3.1 Pro can handle both text and other forms of data like images, making it suitable for multimodal applications.
Kimi K3.1 Pro
Solar Pro 4
Release Timeline
When each model was launched
Kimi K3.1 Pro was released on 2026-10-23, while Solar Pro 4 was released on 2026-08-06.
Kimi K3.1 Pro is 3 months newer than Solar Pro 4.
Oct 23, 2026
6 days ago
2mo newerAug 6, 2026
2 months ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Kimi K3.1 Pro is available from Moonshot AI. Solar Pro 4 is available from Upstage.
Kimi K3.1 Pro
Solar Pro 4
Outputs Comparison
Judge for yourself.
Run your own prompts against Kimi K3.1 Pro and Solar Pro 4 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Kimi K3.1 Pro vs Solar Pro 4.