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OpenAI
GPT-5.3 Codex
gpt-5.3-codex
Guru+flagship
GPT-5.3 Codex is a flagship model in the Majestix lineup built for coding, agentic, tool use workloads, with 400K context and $1.75 / $14.00 per 1M tokens.
Context Window
400K
Max Output
128K
Pricing
$1.75 input / $14.00 output per 1M tokens
What this model is good at
CodingAgenticTool UseDebugging
Benchmarks and operating signals
| Signal | Value | Note |
|---|---|---|
| Context Window | 400K | platform limit |
| Max Output | 128K | platform limit |
| Output Price | $14.00 / 1M | Majestix pricing |
Quick guidance
Use GPT-5.3 Codex when your workload lines up with coding and agentic and you want a clear price-to-capability tradeoff inside Majestix.
This card intentionally focuses on platform context: pricing, limits, and where the model already appears in swarm templates. It is not a self-hosting guide or a vendor deployment manual.
If you want the narrative version, the paired blog intro is the fastest way to explain this model to customers, internal operators, or community readers.