KAT-Coder-Pro V2.5 vs GPT-5.3 Codex
Side-by-side comparison of API pricing, specs, benchmarks, and capabilities
| Specification |
by Kwaipilot
|
by OpenAI
|
|---|---|---|
| Overview | ||
| Status | Current coding | Current coding |
| Released | Jul 10, 2026 | Feb 24, 2026 |
| Pricing per million tokens | ||
| Input | $0.741/Mtok | $1.75/Mtok |
| Output | $2.96/Mtok | $14.00/Mtok |
| Blended avg | $1.30/Mtok | $4.81/Mtok |
| Cached input | $0.148/Mtok | $0.175/Mtok |
| Specifications | ||
| Context window | 256K tokens | 400K tokens |
| Parameters | Proprietary | Proprietary |
| Speed (TPS) | — | — |
| Modalities | ||
| Input |
text
|
textimage
|
| Benchmarks sources: n/a / Vellum LLM Leaderboard | ||
| Avg benchmark score | — | 71 |
| Perf / dollar | — | 14.8 |
| SWE-Bench Verified | — | 85 vendor |
| Terminal-Bench 2.1 | — | 77.3 |
| OSWorld-Verified | — | 64.7 |
| Independent composite scores each on its own scale — not part of the average above | ||
| AA Intelligence Index | — | 44.3 |
| LMSYS Chatbot Arena | — | 1416 ELO |
| Providers | ||
| Available from |
Kwaipilot — $0.741/$2.96/Mtok
|
OpenAI — $1.75/$14.00/Mtok
|
Cost at scale
1M tokens · 50/50 input/output| Volume | KAT-Coder-Pro V2.5 | GPT-5.3 Codex | Savings |
|---|---|---|---|
| 1M tokens | $1.3 | $4.81 | $3.52 (73.1%) |
| 10M tokens | $12.97 | $48.13 | $35.16 (73.1%) |
| 100M tokens | $129.67 | $481.25 | $351.58 (73.1%) |
| 1000M tokens | $1296.75 | $4812.5 | $3515.75 (73.1%) |
When to pick which
distilled from the pricing and spec data above- cost dominates: $1.30/Mtok blended vs $4.81 — 73.1% less on the same 50/50 token mix
- your workload re-reads context (agents, RAG, long chats): cached input costs $0.175/Mtok — 90% off its list input price
- you need the longer context: 400K tokens vs 256K (1.6×)
Summary
KAT-Coder-Pro V2.5 by Kwaipilot costs $0.741/Mtok input and $2.96/Mtok output, with a 256K-token context window. It supports text input.
GPT-5.3 Codex by OpenAI costs $1.75/Mtok input and $14.00/Mtok output, with a 400K-token context window. It supports text, image input.
On a blended cost basis, KAT-Coder-Pro V2.5 is 73.1% cheaper than GPT-5.3 Codex.
The two aren't directly comparable on average benchmark score: GPT-5.3 Codex has published per-benchmark results, while KAT-Coder-Pro V2.5 does not yet.
Note: Pricing is per million tokens. Actual costs vary with usage patterns, prompt caching, and batch discounts. Always verify against official provider pricing pages.