Model summary
IntelligenceUpdated
Speed
Price
Cache Hit Price
Verbosity
GPT-5.5 Instant (June 2026) supports text and image input, outputs text, and has a 400k tokens context window with knowledge up to August 2025.
Pricing for GPT-5.5 Instant (June 2026) is $5.00 per 1M input tokens (expensive, average: $1.55) and $30.00 per 1M output tokens (expensive, average: $8.05).
| Reasoning | Yes This page shows the reasoning version of this model. A non-reasoning variant may also exist. |
|---|---|
| Input modality | Supports: text, image |
| Output modality | Supports: text |
| Knowledge cutoff | Aug 31, 2025 |
| Context window | 400k ~600 A4 pages of size 12 Arial font |
Metrics are compared against models of the same class:
- Non-reasoning models → compared only with other non-reasoning models
- Reasoning models → compared across both reasoning and non-reasoning
- Open weights models → compared only with other open weights models of the same size class:
- Tiny: ≤4B parameters
- Small: 4B–40B parameters
- Medium: 40B–150B parameters
- Large: >150B parameters
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Proprietary models → compared across proprietary and open weights models of the same price range, using a blended 3:1 input/output price ratio:
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<$0.15 per 1M tokens
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$0.15–$1 per 1M tokens
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$1 per 1M tokens Highlights
IntelligenceUpdated #
Artificial Analysis Intelligence Index
Artificial Analysis Intelligence Index by Open Weights / Proprietary
Intelligence Evaluations
[GDPval-AA v2](/evaluations/gdpval-aa)Updated
Agentic real-world work tasks, (Elo-500)/2000
[𝜏³-Banking](/evaluations/tau3-banking)New
Agentic tool use
Agentic coding & terminal use
Coding
Reasoning & knowledge
Scientific reasoning
Physics reasoning
Knowledge
1 - hallucination rate
Long context reasoning
[AA-Briefcase](/evaluations/aa-briefcase)New
Agentic knowledge work, (Elo-500)/2000
Instruction following
Long-horizon agentic tasks
Kubernetes incident root-cause analysis
Visual reasoning
AA-BriefcaseNew #
AA-Briefcase Elo
Openness #
Artificial Analysis Openness Index: Score
Intelligence Index Comparisons #
Intelligence vs. Cost per Intelligence Index Task
Token UseUpdated #
Output Tokens per Intelligence Index Task
Price and CostUpdated #
Cost per Intelligence Index Task
Cost to Run Artificial Analysis Intelligence Index
Pricing: Cache Hit, Input, and Output
Context Window #
Context Window
SpeedUpdated #
Measured by Output Speed (tokens per second)
Output Speed
Time per Intelligence Index Task
Latency #
Measured by Time (seconds) to First Token
Latency: Time To First Answer Token
End-to-End Response Time #
Seconds to output 500 tokens, calculated based on time to first token, 'thinking' time for reasoning models, and output speed
End-to-End Response Time
Model Size (Open Weights Models Only) #
Model Size: Total and Active Parameters
Frequently Asked Questions #
Common questions about GPT-5.5 Instant (June 2026)
GPT-5.5 Instant (June 2026) was released on June 25, 2026.
GPT-5.5 Instant (June 2026) was created by OpenAI.
GPT-5.5 Instant (June 2026) costs $5.00 per 1M input tokens (at the higher end, median: $1.55) and $30.00 per 1M output tokens (at the higher end, median: $8.05), based on OpenAI's API.
GPT-5.5 Instant (June 2026) costs $5.00 per 1M input tokens and $30.00 per 1M output tokens (based on OpenAI's API). For a blended rate (7:2:1 cache hit/input/output ratio), this is $4.35 per 1M tokens. Pricing may vary by provider. Compare provider pricing
Yes, GPT-5.5 Instant (June 2026) is a reasoning model. It uses extended thinking or chain-of-thought reasoning to work through complex problems before providing an answer.
GPT-5.5 Instant (June 2026) supports text and image input.
GPT-5.5 Instant (June 2026) supports text output.
Yes, GPT-5.5 Instant (June 2026) supports image input and can analyze, describe, and answer questions about images.
Yes, GPT-5.5 Instant (June 2026) is multimodal. It can process text and image input and generate text output.
GPT-5.5 Instant (June 2026) has a context window of 400k tokens. This determines how much text and conversation history the model can process in a single request.
No, GPT-5.5 Instant (June 2026) is proprietary. The model weights are not publicly available.
GPT-5.5 Instant (June 2026) is a proprietary model and OpenAI has not disclosed the model size or parameter count.
GPT-5.5 Instant (June 2026) has a knowledge cutoff of August 2025. The model's training data includes information up to this date.
Check the providers page for current API availability. [View providers](/models/gpt-5-5-instant-06-26/providers)
Visit the providers page to see availability. [Compare providers](/models/gpt-5-5-instant-06-26/providers)