One agent session
1M input tokens and 100K output tokens, no caching.
- Input1M x $12.50 = $12.50
- Output0.1M x $75 = $7.50
$20.00per session
OpenAI - Closed weights
GPT-5.6 Cyber pricing and specs
GPT-5.6 Cyber is a closed-weights model from OpenAI that costs $12.50 per 1M input tokens and $75 per 1M output tokens on the first-party API, with a 400K-token context window.
Last verified from developers.openai.com. All sources
- Input / 1M
- $12.50
- Output / 1M
- $75
- Context
- 400K tokens
- Weights
- Closed
Pricing per 1M tokens
| Item | Price / 1M tokens |
|---|---|
| Input | $12.50 |
| Output | $75 |
| Cache read | $1.25 |
| Cache write (5 minutes) | $15.625 |
Note: Gated: requires separate approval and provisioning through OpenAI's Daybreak program (Daybreak Red). Responses API only; Batch not supported. The pricing page lists no long-context price. Maximum input tokens 272,000. Not found in the Vercel AI Gateway model list. release date is the 2026-08-07 changelog entry introducing GPT-5.6 Cyber with the Daybreak access tiers.
Specs
- Context window
- 400,000 tokens
- Max output
- 128,000 tokens
- Release date
- Provider
- OpenAI
- API model id
gpt-5.6-cyber- Weights
- Closed weights
What GPT-5.6 Cyber costs in practice
Worked from the standard list rates above, with the math shown so you can swap in your own token counts.
A chat app
10,000 requests a day at 2K input and 500 output tokens each.
- Input20M x $12.50 = $250.00
- Output5M x $75 = $375.00
$625.00per day
$18,750.00 per 30-day month
The same session at a 90% cache hit
90% of the input is read from the prompt cache. The one-time cache write premium is not included.
- Cached input0.9M x $1.25 = $1.13
- Uncached input0.1M x $12.50 = $1.25
- Output0.1M x $75 = $7.50
$9.88per session
Compare with
| Model | Input / 1M | Output / 1M |
|---|---|---|
| GPT-5.6 Cyber (this page) | $12.50 | $75 |
| o3-proOpenAI | $20 | $80 |
| GPT-4OpenAI | $30 | $60 |
| o1OpenAI | $15 | $60 |
| Claude Fable 5Anthropic | $10 | $50 |
| GPT-6 AstraOpenAI | $10 | $50 |
| Chat LatestOpenAI | $5 | $30 |
| GPT-4 TurboOpenAI | $10 | $30 |
Related reading
- OpenAI's Daybreak Cyber Models Land on Amazon Bedrock: GPT-5.6-Cyber Gets Its First Cloud PathOpenAI Daybreak cyber models are on Amazon Bedrock: GPT-5.6-Cyber and GPT-5.6 Sol for eligible customers, gated by Trusted Access for Cyber enrollment.
- OpenAI Ships GPT-5.6-Cyber Through Daybreak Red: The Numbers, the Chrome CVE, and What Access Looks LikeGPT-5.6-Cyber is OpenAI's gated security model, available only through Daybreak Red. The benchmark numbers, the Chrome V8 CVE it found, and who gets access.
- Codex CLI 0.163: Instant Steering Is Now the DefaultCodex CLI 0.163.0 makes mid-response steering the default and adds searchable /config and a leader key. What changed and what to check before upgrading.
- Tool Calling Under the Hood: Claude Messages vs OpenAI ResponsesHow tool calling works on the wire: JSON schema tools, parallel calls, tool_choice, strict mode and streaming deltas in Claude Messages vs OpenAI Responses.
- Codex 'gpt-5.5 Model Is Not Supported' Error: The FixCodex says gpt-5.5 is not supported with a ChatGPT account because OpenAI retired it from ChatGPT sign-in on October 14. The fix and what still works.
- Codex CLI Background Daemon: How to Turn It OffCodex CLI starts a persistent, self-updating background daemon since 0.157.0. What it does, why it hit Hacker News and the reported workaround to turn it off.
FAQ
How much does GPT-5.6 Cyber cost per million tokens?
GPT-5.6 Cyber costs $12.50 per 1M input tokens and $75 per 1M output tokens on OpenAI's first-party API, per developers.openai.com on October 17, 2026. Per 1M tokens, cache reads cost $1.25.
What is GPT-5.6 Cyber's context window?
GPT-5.6 Cyber has a 400,000-token context window and returns up to 128,000 output tokens per response.
Are GPT-5.6 Cyber's weights open?
No. GPT-5.6 Cyber is a closed-weights model. You call it through OpenAI's API as gpt-5.6-cyber.
When was GPT-5.6 Cyber released?
OpenAI released GPT-5.6 Cyber on August 7, 2026.
Sources
Last verified from developers.openai.com.
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