kimi-k2 vs gpt-5.4
Side-by-side comparison of kimi-k2 and gpt-5.4— benchmarks, pricing, context window and capabilities. Both are accessible through Requesty's unified API. gpt-5.4 outperforms kimi-k2 on 6 of 7 shared benchmarks.
kimi-k2
Input / 1M
$0.60
Output / 1M
$2.50
Context
262K
Model ID
vertex/kimi-k2
gpt-5.4
Input / 1M
$2.50
Output / 1M
$15.00
Context
1.1M
Model ID
openai/gpt-5.4
Benchmark comparison
Intelligence Indexreasoning
kimi-k240.9%
gpt-5.456.8%
Coding Indexcoding
kimi-k234.8%
gpt-5.457.2%
Math Indexmath
kimi-k294.7%
gpt-5.4—
GPQA Diamondreasoning
kimi-k283.8%
gpt-5.492.0%
AIME 2025math
kimi-k294.7%
gpt-5.4—
LiveCodeBenchcoding
kimi-k285.3%
gpt-5.4—
Terminal-Bench Hardagentic
kimi-k231.1%
gpt-5.457.6%
τ²-Benchagentic
kimi-k293.0%
gpt-5.487.1%
SciCodecoding
kimi-k242.4%
gpt-5.456.6%
MMLU Proknowledge
kimi-k284.8%
gpt-5.4—
Humanity's Last Examreasoning
kimi-k222.3%
gpt-5.441.6%
Scores sourced from official model cards, Artificial Analysis, and public leaderboards. Benchmarks measure specific skills and don't capture every aspect of model quality.
Pricing & specifications
| kimi-k2 | gpt-5.4 | |
|---|---|---|
| Input price / 1M | $0.60 | $2.50 |
| Output price / 1M | $2.50 | $15.00 |
| Context window | 262K tokens | 1.1M tokens |
| Max output | 262K tokens | 128K tokens |
| Vision input | Yes | Yes |
| Tool calling | Yes | Yes |
| Reasoning | Yes | Yes |
| Prompt caching | Yes | Yes |
| Computer use | — | — |
| Provider | Google LLC (Vertex AI) | OpenAI Inc. |
Questions people ask
Is kimi-k2 better than gpt-5.4?
gpt-5.4 outperforms kimi-k2 on 6 of 7 shared benchmarks. See the benchmark comparison above for specifics — kimi-k2 and gpt-5.4 have different strengths across reasoning, coding, math and multimodal tasks.
Which is cheaper — kimi-k2 or gpt-5.4?
kimi-k2 is cheaper. kimi-k2 costs $0.60/$2.50 per 1M input/output tokens, while gpt-5.4 costs $2.50/$15.00.
Can I use kimi-k2 and gpt-5.4 through the same API?
Yes. Requesty provides a single OpenAI-compatible API that routes to both. Change just the "model" parameter to switch — "vertex/kimi-k2" or "openai/gpt-5.4" — no other code changes needed.
What are the context windows?
kimi-k2 supports up to 262K tokens of context. gpt-5.4 supports up to 1.1M tokens. Longer context means you can feed larger documents or codebases in a single prompt, though quality often degrades past 128K for most models.
Switch between kimi-k2 and gpt-5.4 with one line of code
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