Kimi K3
Moonshot · released 2026-03-15
Quality (AA Index)80
Input price$0.30
Output price$1.20
Context200K
Throughput150 tok/s
P50 latency0.8s
Kimi K3 vs GPT-5
Side-by-side pricing, capabilities, real-world cost across common scenarios, and our editorial pick.
Add a modelUp to 4 models can be compared
all prices in USD per 1M tokens
GPT-5
OpenAI · released 2026-01-15
Quality (AA Index)91
Input price$1.25
Output price$10.00
Context400K
Throughput120 tok/s
P50 latency0.7s
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Head-to-head specs
Green column = winner per metric| Metric | Kimi K3 | GPT-5 | Verdict |
|---|---|---|---|
Input price /1M tokens | $0.30 | $1.25 | Kimi K3 −76% |
Output price /1M tokens | $1.20 | $10.00 | Kimi K3 −88% |
Context window max input length | 200K | 400K | GPT-5 +2.0× |
AA Quality AA Intelligence Index (0–100) | 80 | 91 | GPT-5 +11pt |
Arena Elo LMArena human-pref Elo (800–2000) | — | — | Tied |
Throughput tokens per second | 150 | 120 | Kimi K3 +25% |
P50 latency first token | 0.8s | 0.7s | GPT-5 −13% |
Vision multimodal | — | ||
Function calling tool use | Tied | ||
Reasoning mode chain-of-thought | — |
Monthly cost across common scenarios
Default usage assumptions| Scenario | Kimi K3 | GPT-5 |
|---|---|---|
customer support 1000K req · 600/180 tok | $396 | $2.5K |
chat with docs 300K req · 4000/300 tok | $468 | $2.4K |
code generation 500K req · 2000/500 tok | $600 | $3.8K |
voice assistant 600K req · 800/200 tok | $288 | $1.8K |
Our pick
For most workloads, choose Kimi K3.
- 76% cheaper input price, which compounds at scale
- 25% faster throughput — matters for streaming UX and voice agents
Choose GPT-5 instead if: Best across-the-board quality but the most expensive token rate in the table; pick GPT-5 when reasoning depth or function-calling reliability outranks per-million-token spend.
Read our deep analysis
Why pick? Use both with smart routing
Phase 2 · gateway with fallback chainSet Kimi K3 as primary, GPT-5 as fallback. One key, one bill, automatic failover when Kimi K3 errors.
PHASE 2 PREVIEW · gateway not live yetThis endpoint does not exist yet. The gateway is in Phase 2 — what you see below is a design preview of the planned interface, not a live API. We will email subscribers when it launches.
Preview the planned API call
$ curl https://api.aipricly.com/v1/chat/completions \
-H "Authorization: Bearer $AIPC_KEY" \
-d '{
"routing": {
"primary": "moonshot/kimi-k3",
"fallback": ["openai/gpt-5"]
},
"messages": [{"role": "user", "content": "..."}]
}'