Arena Elo 1250Human-preference rating · LMArena (shown where the model is ranked)
Capabilities
7-day heat trend
−13.0%Pricing breakdown
Typical 3:1 output-to-input mix, per 1M tokens
Estimated monthly cost by workload
Market position
- Cheaper than 9% of tracked models
- Faster than 93% of tracked models
- Efficiency rank: #1042 of 1105
Best suited for
Mixed text, image, audio and document workloads that benefit from one model across modalities.
About gpt-5.1-chat
GPT-5.1 Chat (AKA Instant is the fast, lightweight member of the 5.1 family, optimized for low-latency chat while retaining strong general intelligence. It uses adaptive reasoning to selectively “think” on...
gpt-5.1-chat is a Multimodal model from OpenAI (US). HotON.ai tracks it at $1.25 per 1M input tokens and $10.00 per 1M output tokens, with a 128K-token context window, ~170 tokens/sec throughput and 100.0% availability. Its composite efficiency score is 85/100 at an estimated $0.008 per successful task.
Compare gpt-5.1-chat
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Frequently asked questions
How much does gpt-5.1-chat cost per 1M tokens?+
gpt-5.1-chat is tracked at $1.25 per 1M input tokens and $10.00 per 1M output tokens. A typical 3:1 output-to-input workload blends to roughly $7.81 per 1M tokens. Figures are illustrative demo data.
What is gpt-5.1-chat best for?+
Mixed text, image, audio and document workloads that benefit from one model across modalities.
How fast is gpt-5.1-chat?+
gpt-5.1-chat delivers about 170 tokens/sec with 100.0% tracked availability, suitable for latency-sensitive, real-time applications.
Is gpt-5.1-chat cheaper than other AI models?+
Within the HotON.ai tracked set, gpt-5.1-chat is cheaper than 9% of models on input price and ranks #1042 of 1105 by overall efficiency.
Related models
Pricing is real (via the TestKey catalog, updated daily). Quality (Arena Elo) is real where the model is ranked on LMArena. Speed, availability and efficiency are modeled estimates.