GPT-5.3 Codex
Closed weights. No supported local deployment or GPU requirement is published.
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AI modelsGPT-5.3 Codex
AI model Released
- API mode
- Responses API*
- Context window
- 400,000 tokens
- Maximum output
- 128,000 tokens
- Open weights
- No
No matched benchmark results are available for this entry yet.
Run it locally
API cost
Standard text-token estimate. Excludes taxes, caching, batch discounts, reasoning and multimodal surcharges. Provider limits and regional availability may differ.
GPT-5.3 Codex
Capabilities
- Context window
- 400,000 tokens
- Maximum input
- 272,000 tokens*
- Maximum output
- 128,000 tokens
- Reasoning
- Yes
- Tool calling
- Yes
- Structured output
- Yes*
- Open weights
- No
- Knowledge cutoff
- 2025-08-31
- API mode
- Responses API*
- Image input
- Yes*
- PDF input
- Yes*
- Parallel tool calls
- Yes*
- Prompt caching
- Yes*
- System messages
- No*
- Tool choice
- Yes*
- Web search
- Yes*
Input modalities
- text
- image
Output modalities
- text
System configuration
Detailed specifications
Specifications · 31 fields
- cache read input token cost
- 1.75e-7*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- cache read input token cost priority
- 3.5e-7*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- deprecation date
- 2027-04-01*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- input cost per token
- 1.75e-6*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- input cost per token priority
- 3.5e-6*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- litellm provider
- openai*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- max input tokens
- 272,000*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- max output tokens
- 128,000*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- max tokens
- 128,000*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- mode
- responses*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- output cost per token
- 1.4e-5*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- output cost per token priority
- 2.8e-5*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- search context cost per query
- search_context_size_high
- 0.01*
- search_context_size_low
- 0.01*
- search_context_size_medium
- 0.01*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- supported endpoints
- /v1/responses*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- supported modalities
- text*
- image*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- supported output modalities
- text*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- supports function calling
- Yes*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- supports minimal reasoning effort
- No*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- supports native streaming
- Yes*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- supports none reasoning effort
- Yes*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- supports parallel function calling
- Yes*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- supports pdf input
- Yes*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- supports prompt caching
- Yes*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- supports reasoning
- Yes*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- supports response schema
- Yes*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- supports system messages
- No*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- supports tool choice
- Yes*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- supports tool search
- Yes*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- supports vision
- Yes*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- supports web search
- Yes*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
- supports xhigh reasoning effort
- Yes*
Scope and conditions
- native_context
- provider
- openai*
- mode
- responses*
- full_native_model_id
- gpt-5.3-codex*
- pricing_scope
- Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
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* Provisional data