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post@silixarcloudinc.com
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GPT-5.3-Codex

gpt-5.3-codex

GPT-5.3-Codex is a vision model from OpenAI, available through SilixarCloudInc for proprietary multimodal understanding for text and image inputs. OpenAI's model for long-running agentic software engineering in Codex-style environments. The serving profile supports a 400K context window and up to 128K output tokens. The published license is Commercial API terms.

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StateAvailable
ProviderOpenAI
ReleasedFeb 5, 2026
LicenseCommercial API terms
Model overview

About GPT-5.3-Codex

GPT-5.3-Codex is a vision model from OpenAI, available through SilixarCloudInc for proprietary multimodal understanding for text and image inputs. OpenAI's model for long-running agentic software engineering in Codex-style environments. The serving profile supports a 400K context window and up to 128K output tokens. The published license is Commercial API terms.

Access process

Use GPT-5.3-Codex through SilixarCloudInc.

  1. 01
    Choose the model

    Use the published identifier and pricing on this page.

  2. 02
    Contact SilixarCloudInc

    Tell us your expected workload and billing requirements.

  3. 03
    Begin integration

    We confirm access and onboarding instructions by email.

All enquiries are handled through post@silixarcloudinc.com.
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Model FAQ

Frequently asked questions.

Key facts about GPT-5.3-Codex, its pricing, capabilities, and access through SilixarCloudInc.

What is GPT-5.3-Codex?

GPT-5.3-Codex is a vision model from OpenAI, available through SilixarCloudInc for proprietary multimodal understanding for text and image inputs. OpenAI's model for long-running agentic software engineering in Codex-style environments. The serving profile supports a 400K context window and up to 128K output tokens. The published license is Commercial API terms.

What model identifier should I use for GPT-5.3-Codex?

Use gpt-5.3-codex as the model identifier when configuring this model through SilixarCloudInc.

How is GPT-5.3-Codex priced?

Input at $1.75 per M Tokens, Cached input at $0.175 per M Tokens, Output at $14 per M Tokens. Charges follow recorded usage and the billing unit shown above.

What functionality does GPT-5.3-Codex support?

The current serving profile supports Serverless, Image input, JSON mode, Structured outputs, Tools. Capabilities marked as not supported are not included in this published profile.

What are the context and output limits for GPT-5.3-Codex?

The published context length is 400K, and the maximum output is 128K.

How do I get access to GPT-5.3-Codex?

Select “Use this model” and contact SilixarCloudInc at post@silixarcloudinc.com. We will confirm availability, account setup, and integration details by email.

Use GPT-5.3-Codex

Discuss access with our team.

Contact SilixarCloudInc for model availability, account setup, and integration details.