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  • Published: July 30, 2026
  • Last verified: September 24, 2026
  • Status: Active. The standard Luna and Terra rates below match public pricing as of September 24, 2026. gpt-5.6-sol was cut later; see the September 24, 2026 GPT-5.6 Sol price cut notice.
Starting July 30, 2026, OpenAI reduced GPT-5.6 Luna API prices by 80% and GPT-5.6 Terra API prices by 20%. LaoZhang API has applied the new rates automatically, so you do not need to change API keys, base URLs, model names, request parameters, or integration code. OpenAI attributes the cut to efficiency gains across its models, inference systems, and agent harness (OpenAI announcement).

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New Luna and Terra prices

Prices are in US dollars per 1M tokens for standard requests with no more than 272K input prompt tokens.
Special token groups, service tiers, or other billing modes are shown on the console model and pricing page and in call logs.

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What about gpt-5.6-sol?

gpt-5.6-sol was not part of the July 30 change. At publication, its price stayed at $5.00 input, $30.00 output, and $0.50 cached input per 1M tokens, or $10.00 input and $45.00 output for prompts over 272K input tokens. OpenAI cut Sol prices on August 21, 2026, and LaoZhang API applied the new rates on September 10, 2026. The GPT-5.6 Sol price cut notice lists the old and new standard and long-context rates.

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How are prompts over 272K input tokens priced?

When a request contains more than 272K input prompt tokens, OpenAI applies 2× input pricing and 1.5× output pricing to the entire request. With the new Luna and Terra rates: The long-context multiplier applies to the full request, not only to tokens above 272K. Use the complete input-token count when estimating cost, then verify actual charges in the console call log.

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Who is affected?

  • gpt-5.6-luna users receive the new price automatically and can reevaluate the cost of bulk classification, extraction, and high-throughput agent workloads.
  • gpt-5.6-terra users receive the 20% reduction automatically.
  • gpt-5.6-sol was not part of this change; its later price change is described in the Sol section above.
  • API keys, the https://api.laozhang.ai/v1 base URL, model IDs, and request formats do not change.

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What do users need to do?

  1. No code changes are required: keep using the existing API key, endpoint, and model name.
  2. Update cost forecasts: recalculate Luna and Terra batch jobs and agent workflows with the new rates.
  3. Account for long context: if an input prompt can exceed 272K tokens, estimate the full request at the long-context rate.
  4. Verify actual billing: confirm the token group on the console model and pricing page, then check token usage and charges in call logs.

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Frequently asked questions

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Do I need a new API key, base URL, or model name?

No. This update changes pricing only. Existing LaoZhang API keys, base URLs, model IDs, and request formats continue to work.

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Is only the portion above 272K tokens charged at the higher rate?

No. Once the input prompt exceeds 272K tokens, the 2× input and 1.5× output multipliers apply to the entire request.

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Did gpt-5.6-sol become cheaper?

Not on July 30: Sol pricing was unchanged when this announcement was published. Sol became cheaper later, as described in the “What about gpt-5.6-sol?” section above.

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Are earlier calls recalculated at the new price?

No. The new rates apply from July 30, 2026 and do not change charges recorded for earlier calls. Use your console billing records for historical usage.

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How can I confirm that my token uses the new price?

Open the console model and pricing page, confirm the model and token group, then send one low-volume request and review its input tokens, output tokens, and actual charge in the call log.