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| Attribute | GPT-6 Lunagpt-6-luna | Muse Spark 1.3muse-spark-1.3 | Nova-3nova-3 | S1s1 |
|---|---|---|---|---|
| Pricing | ||||
| Input | $0.10 / 1M | $1.25 / 1M | $0 / 1M | $0 / 1M |
| Output | $0.50 / 1M | $4.25 / 1M | $0 / 1M | $0 / 1M |
| Cache Write (5m) | $0.10 / 1M | $1.25 / 1M | Not applicable | Not applicable |
| Cache Write (1h) | $0.10 / 1M | $1.25 / 1M | Not applicable | Not applicable |
| Cache Read | $0.10 / 1M | $1.25 / 1M | Not applicable | Not applicable |
| Web Search | $0 / 1M | $0 / 1M | $0 / 1M | $0 / 1M |
| Context | ||||
| Max context | 1.1M | 1M | N/A | N/A |
| Max output | N/A | N/A | N/A | N/A |
| Capabilities | ||||
| Vision | Yes | Yes | No | No |
| Function Calling | Yes | Yes | No | No |
| JSON Mode | Yes | Yes | No | No |
| Streaming | Yes | Yes | No | No |
| Catalogue | ||||
| Provider | OpenAI | Meta | Deepgram | Fish Audio |
| Category | chat | chat | voice | voice |
| Charge type | Pay As You Go | Pay As You Go | Pay As You Go | Pay As You Go |
| Released | — | — | 2026-07-15 | 2026-07-29 |
| Description | ||||
| Summary | GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, optimized for high-volume and latency-sensitive workloads such as chat, classification, and lightweight agentic tasks. It combines low-cost, responsive inference with the GPT-6 family’s improvements in factual reliability and clear, concise communication. At higher reasoning effort, GPT-6 Luna can also handle complex software engineering and computer-use workflows that previously required a Sol-tier model, making it a versatile choice for scalable production applications that need to balance speed, cost, and capability. | Muse Spark 1.3 is Meta's multimodal reasoning model designed for long-running agentic, multi-agent, and coding workflows. It maintains context and information across extended tasks, enabling reliable execution in complex, multi-step environments. The model is optimized to resolve conflicting information, seek clarification or confirmation when necessary, and execute concisely, making it well suited for autonomous agents, collaborative multi-agent systems, and long-horizon software engineering workflows. | Deepgram Nova-3 speech-to-text. Billed per second of audio. | Fish Audio S1 text-to-speech. Billed per UTF-8 byte of input text. |