Kimi K3 vs Qwen3.8 Flash: Specs & Benchmark Comparison
Kimi K3 is developed by Moonshot AI, while Qwen3.8 Flash comes from Alibaba. Kimi K3 was released in July 2026, and Qwen3.8 Flash followed a month later in August 2026. Kimi K3 is the larger model at roughly 2.8 trillion parameters, against 125 billion for Qwen3.8 Flash.
The two models share 2 published benchmarks. Kimi K3 leads on 2 of them. The widest gaps are on MathVision, where Kimi K3 scores 98.0% against 95.7%; GPQA, where Kimi K3 scores 94.0% against 91.7%. Averaged across everything we track, Kimi K3 sits at 95.7% and Qwen3.8 Flash at 68.5%.
Qwen3.8 Flash is the cheaper API at $0.15 per million input tokens and $0.47 per million output tokens, roughly 20 times cheaper than Kimi K3 at $3 and $15. Both accept a context window of about 1M tokens. Kimi K3 accepts text and images as input, while Qwen3.8 Flash accepts text, images, and video. On tooling, only Kimi K3 supports function calling and only Kimi K3 offers structured output.
| Characteristic | Kimi K3 | Qwen3.8 Flash |
|---|---|---|
| Company | Moonshot AI | Alibaba |
| Release Date | July 16, 2026 | August 26, 2026 |
| Parameters | 2.8T | 125B |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 1.0M |
| Context (output) | 1.0M | 131K |
| Input Price / 1M | $3.00 | $0.15 |
| Output Price / 1M | $15.00 | $0.47 |
| Average Score | 95.7% | 68.5% |
| Benchmarks | ||
| MathVision | 98.0% | 95.7% |
| GPQA | 94.0% | 91.7% |
Visual Benchmark Comparison
Verdict
Qwen3.8 Flash leads in 3 out of 4 comparison categories.
Both models show comparable average scores: Kimi K3 — 1.0, Qwen3.8 Flash — 0.7.
Qwen3.8 Flash is 29.0x cheaper: input $0.15/1M vs $3.00/1M tokens.
Qwen3.8 Flash supports a larger context: 1M vs 1M tokens.
Qwen3.8 Flash is newer: released 8/26/2026 vs 7/16/2026.
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Frequently Asked Questions
Which is better for coding — Kimi K3 or Qwen3.8 Flash?
Which model is cheaper — Kimi K3 or Qwen3.8 Flash?
Which has a larger context window — Kimi K3 or Qwen3.8 Flash?
The Kimi K3 and Qwen3.8 Flash comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Kimi K3 or Qwen3.8 Flash page. See also the complete list of AI model comparisons.