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Model infoModelsSnapshot: 15 Oct 2026

OpenAI / GPT-5.4

GPT-5.4

OpenAI text generation, reasoning, agents model with developer-documented API access and version information.

Language models (LLMs)
availableClosed weightsText generationReasoningAgentsVision
Official documentation (opens in a new tab)Reviewed 12 Oct 2026
15 of 19 specification fields collected
Context window1.05M1,050,000 tokens
Maximum output128K128,000 tokens
Input / 1M tokens$2.50OpenAI API
Output / 1M tokens$15.00USD · observed 12 Oct 2026

Specifications

Provider-documented facts. “Not collected” means we have not verified that field yet, not that the feature is unsupported.

Context / input limit
1,050,000 tokensSource for Context / input limit (opens in a new tab)
Maximum output
128,000 tokensSource for Maximum output (opens in a new tab)
Input modalities
Text, ImageSource for Input modalities (opens in a new tab)
Output modalities
TextSource for Output modalities (opens in a new tab)
Reasoning
SupportedSource for Reasoning (opens in a new tab)
Tool calling
SupportedSource for Tool calling (opens in a new tab)
Structured output
SupportedSource for Structured output (opens in a new tab)
Streaming
SupportedSource for Streaming (opens in a new tab)
Batch processing
SupportedSource for Batch processing (opens in a new tab)
Fine-tuning
Not supportedSource for Fine-tuning (opens in a new tab)
Knowledge cutoff
2025-08-30Source for Knowledge cutoff (opens in a new tab)
Release date
Not collected
Parameters
Not collected
Architecture
Not collected
Languages
Not collected
Supported API routes
v1/chat/completions, v1/responses, v1/batchSource for Supported API routes (opens in a new tab)
Snapshots and aliases
gpt-5.4-2026-03-05Source for Snapshots and aliases (opens in a new tab)

Aliases and pinned IDs listed by the developer. A snapshot date is not automatically the public release date.

Supported tools
function_calling, web_search, file_search, tool_search, image_generation, code_interpreter, hosted_shell, apply_patch, skills, computer_use, mcpSource for Supported tools (opens in a new tab)
Context caching
SupportedSource for Context caching (opens in a new tab)

Documented on at least one recorded endpoint. See Caching for host, lifecycle and billing restrictions.

Access & pricing

Prices belong to an endpoint and billing tier. A provider listing does not guarantee access for every account or region.

OpenAI API

Provider source (opens in a new tab)
API model ID
gpt-5.4
Access
API account required. Model-specific permissions and rate limits apply.
Regions
Not collected
INPUT / 1M TOKENS$2.50
OUTPUT / 1M TOKENS$15.00

Standard text-token rates. Other modalities, tool usage and processing modes are billed separately. Long-context pricing applies to the full request; cached-rate treatment is shown only where explicit. Cached input price: $0.25 / 1M tokens (base tier).

Pricing by prompt length, USD / 1M tokens
Input lengthInputOutputCached input
Up to 272K input tokens$2.50$15.00$0.25
Above 272K input tokens$5.00$22.50Not collected
USD · observed 12 Oct 2026 · Pricing evidence (opens in a new tab)
Published billing units · original currency · observed 12 Oct 2026
CategoryUsageRateUnit
Text tokensInput1$2.501M tokens
Text tokensCached input1$0.251M tokens
Text tokensOutput1$15.001M tokens

Rate conditions

  1. Base published rate. Check the model-card pricing conditions and the request modality.
Pricing source (opens in a new tab)

Data & enterprise terms

API data controls and retention depend on endpoint and account configuration; consult the linked provider policy.

Read the service policy (opens in a new tab)

Perplexity Agent API

Provider source (opens in a new tab)
API model ID
openai/gpt-5.4
Access
Legacy route scheduled to retire October 24, 2026 at 00:00 UTC. The changelog says it remains available until that cutoff. Current host-specific prices and non-default service tiers have not been collected. Use a Perplexity API key and POST /v1/agent.
Regions
Not collected
Streaming
SupportedSource for Streaming (opens in a new tab)
Scheduled retirement
2026-10-24 00:00 UTCSource for Scheduled retirement (opens in a new tab)

Endpoint pricing has not been collected. Check the provider for applicable rates.

Data & enterprise terms

Retention, training use, regional processing and enterprise terms have not been summarized for this endpoint.

Caching

Caching can reuse earlier input processing. Availability, lifetime and billing depend on the endpoint. A cache hit still generates a new response.

01 / INITIAL INPUTProcess & retain

The system processes eligible input and retains reusable state.

02 / LATER REQUESTCheck available state

Reuse depends on matching input, session state and the cache policy.

03 / CACHE HITReuse & generate

Reusing state can reduce repeated work. Any charges follow the billing rules below.

OpenAI API

gpt-5.4
Documented
Support evidence (opens in a new tab)
How it works
Automatic prefix reuseSource for How it works (opens in a new tab)
Minimum reusable input
Varies with model and request settings; hidden system tokens do not count toward the minimum.Source for Minimum reusable input (opens in a new tab)
Lifetime & refresh
in_memory: typically 5–10 minutes inactive, at most 1 hour. Optional 24h retention: typically about 30 minutes, at most 24 hours.Source for Lifetime & refresh (opens in a new tab)
How to enable it
Keep the prompt prefix identical. A stable prompt_cache_key can improve routing; it does not guarantee a hit.Source for How to enable it (opens in a new tab)
Usage fields
Inspect cached_tokens in API usage; older models report multiples of 128 after excluding hidden system tokens.Source for Usage fields (opens in a new tab)
Billing rules
No additional cache-write charge. Reused input uses the cached-input rate; uncached input and output retain their normal rates.Source for Billing rules (opens in a new tab)
Limits & data boundaries
Exact rendered-prefix matching. No sharing across organizations or processing regions. Routing and load can prevent hits. Check account retention policy before selecting persistent caching.Source for Limits & data boundaries (opens in a new tab)
Cache reads, writes & storage
ChargeApplies toRate / unit
Cache read1Text tokens · Up to 272K input tokens$0.25 / 1M tokensPricing evidence (opens in a new tab)

Rate conditions

  1. Standard text-token rates. Other modalities, tool usage and processing modes are billed separately. Long-context pricing applies to the full request; cached-rate treatment is shown only where explicit.

Observed 12 Oct 2026. Write rates and storage fees are different charges; use the billing rules above.

Caching reviewed 12 Oct 2026

Perplexity Agent API

openai/gpt-5.4
Not verified
How it works
Not collected
Minimum reusable input
Not collected
Lifetime & refresh
Not collected
How to enable it
Not collected
Usage fields
Not collected
Billing rules
Not collected
Limits & data boundaries
Not collected

No verified cache rate for this endpoint. An empty rate is not a zero charge.

What the measurements say

No benchmark observations have been added for this model. We do not turn a vendor description into a performance score.

Latency and throughput depend on the host, request size, reasoning settings and load. There is no measured speed or global usage figure in this record.

The record behind the model

Why it is included

Proprietary OpenAI release in the official hosted-model catalog. Explicit open-weight releases and unresolved routing aliases are excluded.

Classification evidence (opens in a new tab)

Sources reviewed