GPT-5.5 Instant (June 2026) Intelligence, Performance and Price Analysis

OpenAI released GPT-5.5 Instant on June 25, 2026, a reasoning model with a 400k-token context window and knowledge cutoff of August 2025. Priced at $5.00 per 1M input tokens and $30.00 per 1M output tokens, it supports text and image input and outputs text, positioning it as an expensive but high-performance option for complex tasks.

GPT-5.5 Instant June 2026 Intelligence, Performance & Price Analysis API Provider Benchmarks /models/gpt-5-5-instant-06-26/providers 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 - Proprietary models → compared across proprietary and open weights models of the same price range, using a blended 3:1 input/output price ratio: - <$0.15 per 1M tokens - $0.15–$1 per 1M tokens - $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 /models/gpt-5-5-instant-06-26/providers 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