GPT-5.6 introduces improvements to artificial intelligence efficiency across models, inference, and agentic workflows.
The update is designed to deliver more useful intelligence per dollar spent on AI processes.
GPT-5.6 improves AI efficiency across models and workflows
The update aims to deliver higher utility per dollar through improved inference and agentic intelligence.
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Steve A Johnson
Updates
OpenAI has reduced prices for the GPT-5.6 Terra and Luna models three weeks after their release. The price of GPT-5.6 Terra was cut by 20% to $2 per million input tokens and $12 per million output tokens, while GPT-5.6 Luna saw an 80% reduction to $0.20 per million input tokens and $1.20 per million output tokens. The pricing for the flagship GPT-5.6 Sol model remains unchanged.
OpenAI has officially reduced pricing for its GPT-5.6 series three weeks after launch to address growing competition and customer cost concerns. The cost of GPT-5.6 Terra has been cut by 20% to $2 per million input tokens and $12 per million output tokens, while GPT-5.6 Luna saw an 80% price reduction to $0.20 per million input and $1.20 per million output tokens. Pricing for the flagship GPT-5.6 Sol model remains unchanged.
OpenAI has reduced prices for the GPT-5.6 Terra and Luna models. GPT-5.6 Terra's cost was cut by 20% to $2 per million input tokens and $12 per million output tokens, down from $2.50 and $15 respectively. GPT-5.6 Luna saw an 80% price reduction to $0.20 per million input and $1.20 per million output tokens, compared to previous rates of $1 and $6. Additionally, OpenAI introduced a 'Fast' mode for GPT-5.6 Sol, priced at twice the standard API rate, which replaces the former Priority Processing service.
OpenAI has reduced prices for the GPT-5.6 Terra and Luna models. GPT-5.6 Terra's input costs dropped from $2.50 to $2 per million tokens, and output costs from $15 to $12, while GPT-5.6 Luna saw an 80% price reduction, moving from $1 input/$6 output to $0.20 input/$1.20 output per million tokens. Additionally, OpenAI introduced a 'Fast' mode for the GPT-5.6 Sol model, replacing the former Priority Processing service, with pricing set at double the standard API rate.
OpenAI has officially reduced the API pricing for its GPT-5.6 Terra and Luna models to increase cost-efficiency. GPT-5.6 Terra's price decreased by 20%, falling to $2 per million input tokens and $12 per million output tokens from its previous $2.50 and $15 rates, while GPT-5.6 Luna saw an 80% reduction to $0.20 per million input and $1.20 per million output tokens, down from $1 and $6 respectively. Additionally, OpenAI introduced a 'Fast mode' for the GPT-5.6 Sol model, priced at double the standard API rate, to replace the former Priority Processing service.
OpenAI has reduced the prices for GPT-5.6 Terra and Luna, with Terra's cost dropping from $2.50 to $2 per million input tokens and $15 to $12 per million output tokens. GPT-5.6 Luna saw a more significant 80% price cut, falling from $1 to $0.20 per million input tokens and $6 to $1.20 per million output tokens. Additionally, a new Fast mode has been introduced for GPT-5.6 Sol, which replaces the Priority Processing service to allow responses up to 2.5 times faster at twice the standard API rate.
OpenAI has announced price reductions for the GPT-5.6 series, cutting GPT-5.6 Terra's cost by 20% to $2 per million input tokens and $12 per million output tokens from its previous $2.50 and $15 rates. Additionally, GPT-5.6 Luna prices have dropped by 80% to $0.20 per million input tokens and $1.20 per million output tokens, down from $1 and $6 respectively. While GPT-5.6 Sol pricing remains unchanged, the company introduced a new 'Fast mode' for the Sol model, which provides up to 2.5 times faster responses at twice the standard API rate.
OpenAI has implemented significant price reductions for the GPT-5.6 series, cutting the cost of GPT-5.6 Terra by 20% to $2 per million input tokens ($2.50 previously) and slashing GPT-5.6 Luna's price by 80% to $0.20 per million input tokens ($1 previously). Additionally, a new 'Fast mode' has been introduced for GPT-5.6 Sol, priced at twice the standard rate to provide up to 2.5 times faster responses for time-sensitive workloads.
OpenAI has announced significant price reductions for the GPT-5.6 series, cutting GPT-5.6 Terra's cost by 20% to $2 per million input tokens and $12 per million output tokens from its previous rates of $2.50 and $15. Additionally, GPT-5.6 Luna's price has dropped by 80% to $0.20 per million input tokens and $1.20 per million output tokens, down from $1 and $6 respectively. While GPT-5.6 Sol pricing remains unchanged, a new Fast mode has been introduced for the Sol model, priced at twice the standard API rate.
OpenAI has implemented significant price reductions for the GPT-5.6 series, cutting GPT-5.6 Terra's cost by 20% to $2 per million input tokens and $12 per million output tokens from its previous $2.50 and $15 rates. Additionally, GPT-5.6 Luna's price has dropped by 80% from $1 to $0.20 per million input tokens and from $6 to $1.20 per million output tokens. While GPT-5.6 Sol pricing remains unchanged, a new Fast mode has been introduced for Sol, priced at twice the standard API rate.
OpenAI has implemented significant price reductions for its GPT-5.6 series, cutting GPT-5.6 Terra's costs from $2.50 to $2 per million input tokens and $15 to $12 per million output tokens. Additionally, GPT-5.6 Luna's price has been slashed by 80%, dropping from $1 to $0.20 per million input tokens and $6 to $1.20 per million output tokens. While GPT-5.6 Sol pricing remains unchanged, OpenAI has introduced a new 'Fast mode' for Sol that produces responses up to 2.5 times faster at twice the standard API rate.
OpenAI has announced significant price reductions for the GPT-5.6 series, cutting GPT-5.6 Terra costs by 20% to $2 per million input and $12 per million output tokens, while GPT-5.6 Luna saw an 80% drop from its previous $1/$6 pricing to $0.20/$1.20 per million tokens. Additionally, the company introduced a 'Fast mode' for GPT-5.6 Sol, which is priced at twice the standard rate to provide up to 2.5 times faster response speeds.
OpenAI has implemented significant price reductions for its GPT-5.6 series to counter competition from Chinese startups and other tech giants. The price of GPT-5.6 Terra was cut by 20% from $2.50 to $2 per million input tokens and from $15 to $12 per million output tokens, while GPT-5.6 Luna saw an 80% decrease, dropping from $1 to $0.20 per million input tokens and from $6 to $1.20 per million output tokens. Additionally, a new 'Fast mode' has been introduced for GPT-5.6 Sol, which replaces the Priority Processing service and offers responses up to 2.5 times faster at twice the standard API rate.
OpenAI has announced significant price reductions for the GPT-5.6 series effective July 30, 2026, cutting GPT-5.6 Terra's rates by 20% to $2 per million input and $12 per million output tokens, while slashing GPT-5.6 Luna's prices by 80% to $0.20 per million input and $1.20 per million output tokens. Additionally, a new Fast mode has been introduced for GPT-5.6 Sol, which replaces the Priority Processing service and offers up to 2.5 times faster response speeds at twice the standard API rate.
OpenAI has implemented significant price reductions for the GPT-5.6 series, cutting GPT-5.6 Terra's costs by 20% to $2 per million input tokens and $12 per million output tokens, while GPT-5.6 Luna saw an 80% drop from its previous rates to $0.20 per million input and $1.20 per million output tokens. Additionally, a new Fast mode for GPT-5.6 Sol has been introduced, offering response speeds up to 2.5 times faster at twice the standard API rate. These changes aim to defend market share against low-cost Chinese rivals and addressed mounting pressure from cost-sensitive customers.
OpenAI has implemented significant price reductions for its GPT-5.6 series, cutting GPT-5.6 Terra's cost by 20% to $2 per million input/ $12 per million output tokens and decreasing GPT-5.6 Luna's price by 80% to $0.20 per million input/ $1.20 per million output tokens. While GPT-5.6 Sol pricing remains unchanged, the company introduced a new 'Fast mode' for Sol at twice the standard API rate. Additionally, OpenAI is upgrading Auto-review in ChatGPT and Codex CLI from GPT-5.4 to GPT-5.6 Luna to leverage these efficiency gains.
OpenAI reduced the price of GPT-5.6 Terra by 20% — from $2.50 to $2 per million input tokens and from $15 to $12 per million output tokens — and slashed GPT-5.6 Luna’s price by 80% — from $1 to $0.20 per million input tokens and from $6 to $1.20 per million output tokens — effective July 30, 2026, in response to competitive pressure from Chinese open-weight models like Kimi K3 and DeepSeek V4 Pro, while keeping GPT-5.6 Sol’s standard pricing unchanged at $5 and $30 per million tokens respectively.
OpenAI reduced the price of GPT-5.6 Terra by 20% — from $2.50 to $2 per million input tokens and from $15 to $12 per million output tokens — and slashed GPT-5.6 Luna’s price by 80% — from $1 to $0.20 per million input tokens and from $6 to $1.20 per million output tokens — effective July 30, 2026, making Luna more cost-competitive than Chinese rivals like DeepSeek V4 Pro and Kimi K3, while Sol’s pricing remained unchanged.
OpenAI reduced the price of GPT-5.6 Terra by 20% — from $2.50 to $2 per million input tokens and from $15 to $12 per million output tokens — and slashed GPT-5.6 Luna’s price by 80% — from $1 to $0.20 per million input tokens and from $6 to $1.20 per million output tokens — effective July 30, 2026, making Luna more cost-competitive than Chinese rivals like DeepSeek V4 Pro and Kimi K3, while Sol’s pricing remained unchanged.
OpenAI reduced the price of GPT-5.6 Terra by 20% — from $2.50 to $2 per million input tokens and from $15 to $12 per million output tokens — and slashed GPT-5.6 Luna’s price by 80% — from $1 to $0.20 per million input tokens and from $6 to $1.20 per million output tokens — effective July 30, 2026, making Luna more cost-competitive than Chinese rivals like DeepSeek V4 Pro and Kimi K3, while Sol’s pricing remained unchanged.
OpenAI reduced the price of GPT-5.6 Terra by 20%—from $2.50 to $2 per million input tokens and from $15 to $12 per million output tokens—and slashed GPT-5.6 Luna’s price by 80%—from $1 to $0.20 per million input tokens and from $6 to $1.20 per million output tokens, making Luna more cost-competitive than Chinese rivals like DeepSeek V4 Pro and Kimi K3, while Sol’s pricing remained unchanged.
OpenAI reduced the price of GPT-5.6 Terra by 20% — from $2.50 to $2 per million input tokens and from $15 to $12 per million output tokens — and slashed GPT-5.6 Luna’s price by 80% — from $1 to $0.20 per million input tokens and from $6 to $1.20 per million output tokens — making Luna more cost-competitive than Chinese rivals like DeepSeek V4 Pro and Kimi K3, while also making Luna the default model for Free and Go users and introducing unlimited text chats and a new 'Think' button for them, effective immediately.
OpenAI reduced the price of GPT-5.6 Terra by 20%—from $2.50 to $2 per million input tokens and from $15 to $12 per million output tokens—and slashed GPT-5.6 Luna’s price by 80%—from $1 to $0.20 per million input tokens and from $6 to $1.20 per million output tokens—making Luna more cost-competitive than Chinese rivals like DeepSeek V4 Pro and Kimi K3, while Sol’s pricing remained unchanged at $5 and $30 per million input and output tokens respectively.
OpenAI reduced the price of GPT-5.6 Terra by 20% — from $2.50 to $2 per million input tokens and from $15 to $12 per million output tokens — and slashed GPT-5.6 Luna’s price by 80% — from $1 to $0.20 per million input tokens and from $6 to $1.20 per million output tokens — making Luna more cost-competitive than rivals like DeepSeek V4 Pro and Kimi K3, while also making Luna the default model for Free and Go users and removing text chat rate limits for them next week.
OpenAI reduced the price of GPT-5.6 Terra by 20%—from $2.50 to $2 per million input tokens and from $15 to $12 per million output tokens—and slashed GPT-5.6 Luna’s price by 80%—from $1 to $0.20 per million input tokens and from $6 to $1.20 per million output tokens, making Luna more cost-competitive than rivals like DeepSeek V4 Pro and Kimi K3, while Sol’s pricing remained unchanged at $5 and $30 per million tokens respectively.
OpenAI reduced the price of GPT-5.6 Terra by 20% — from $2.50 to $2 per million input tokens and from $15 to $12 per million output tokens — and slashed GPT-5.6 Luna’s price by 80% — from $1 to $0.20 per million input tokens and from $6 to $1.20 per million output tokens — making Luna more cost-competitive than rivals like DeepSeek V4 Pro and Kimi K3, while also making Luna the default model for Free and Go users this week and removing rate limits on their text chats starting next week.
OpenAI reduced the price of GPT-5.6 Terra by 20%—from $2.50 to $2 per million input tokens and from $15 to $12 per million output tokens—and slashed GPT-5.6 Luna’s price by 80%—from $1 to $0.20 per million input tokens and from $6 to $1.20 per million output tokens—making Luna more cost-competitive than rivals like DeepSeek V4 Pro and Kimi K3, while also making Luna the default model for Free and Go users this week and eliminating rate limits on text chats for those tiers starting next week.
OpenAI reduced the price of GPT-5.6 Terra by 20%—from $2.50 to $2 per million input tokens and from $15 to $12 per million output tokens—and slashed GPT-5.6 Luna’s price by 80%—from $1 to $0.20 per million input tokens and from $6 to $1.20 per million output tokens—making Luna the most cost-competitive model in its class, while Sol’s pricing remained unchanged.
OpenAI reduced the price of GPT-5.6 Terra by 20% — from $2.50 to $2 per million input tokens and from $15 to $12 per million output tokens — and slashed GPT-5.6 Luna’s price by 80% — from $1 to $0.20 per million input tokens and from $6 to $1.20 per million output tokens — making Luna more cost-competitive than rivals like DeepSeek V4 Pro and Kimi K3, while also making Luna the default model for Free and Go users and removing rate limits on their text chats starting next week.
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