GPT-5.6 Sol
GPT-5.6 Sol is OpenAI's flagship frontier model — the top tier of a three-model GPT-5.6 family (Sol, Terra, Luna) named after the Sun, Earth, and Moon. Sol targets the hardest professional work: coding agents, long-running research, computer use, and cybersecurity, with a 1.05M-token context window and a high-effort "Sol Ultra" mode.
OpenAI previewed GPT-5.6 Sol on June 26, 2026, shipping it only to government-vetted partners under a 30-day cybersecurity safety review tied to a Trump-administration executive order, before releasing it broadly alongside Terra and Luna on July 9, 2026. Sol prices at $5/$30 per million input/output tokens.
Same family as GPT-5.5, but the version OpenAI made the government sign off on first.
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Why is it emerging now?
OpenAI gated GPT-5.6 Sol behind a government cybersecurity review before its July 9, 2026 general release, then days later a Sol Ultra agent deleted a tester's home directory.
Search Interest
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Nascent0–7 days
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Emergent8–30 days
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Validating ← now31–90 days
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Rising91–180 days
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Established180 days +
Outlook
6-month signal projection and commercial timeline.
Government-gated rollout plus a viral safety incident within days of GA gives Sol a longer, two-phase news cycle than a typical model launch.
Risk · Rapid successor cadence (OpenAI ships every 4-8 weeks) and reports of context-window regression could compress the SEO window inside 60-90 days.
Analogs · GPT-5.5 · Claude Fable 5 · Claude Opus 4.7
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nowComparison content, incident explainers
GPT-5.6 Sol vs Claude Fable 5 benchmark posts and the Ultra-mode file-deletion writeup are ranking within days of the events.
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3-6moTier-selection guides and safety tooling
Sol vs Terra vs Luna cost/capability guides, plus agent-sandboxing and approval-mode tooling built in response to the deletion incident.
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6-12moGovernment-review playbooks
As the 30-day pre-release safety review becomes a template other AI labs face, explainer and compliance content around the process gains durable search demand.
Competition & Opportunity for term “GPT-5.6 Sol”
Signals derived from the tracked queries, the term's monetization cards, and its cluster neighbors. Heuristic except where marked measured (Google KD).
Ideas for term “GPT-5.6 Sol”
Buildable pitches — turn this term into an article, site, product, post, newsletter, video, or course. Steal any card and run with it.
Sol leads Agents' Last Exam (53.6 vs Fable's implied ~40.5) and the Artificial Analysis Coding Agent Index (80 vs 77.2), but sits within 1 point of Fable on the broader Intelligence Index — a genuine split worth a workflow-segmented comparison.
Three tiers at $5/$30, $2.50/$15, and $1/$6 per million tokens create clear long-tail demand from developers deciding which tier fits a given agent workload.
The first frontier model release gated behind an executive-order-mandated cybersecurity review is a template other labs will likely follow — an underexplained process most coverage only summarizes in one paragraph.
The Matt Shumer deletion incident happened specifically because Sol Ultra ran in Full Access mode; a lightweight approval-gate wrapper for local agent runs addresses a concrete, recently-demonstrated risk.
Recreates the risk profile behind the viral deletion incident in a controlled sandbox, explaining exactly which permission settings to avoid.
The preview-to-GA-to-incident arc across three weeks gives a natural three-part hook for a recurring model-tracking newsletter.
Before anyone outside a trusted-partner list could touch GPT-5.6 Sol, three cabinet-level officials had to sign off — under an executive order most people haven't read.
OpenAI's own June 26 safety card classified 'actions a user would strongly object to' as severity level 3. Sixteen days later, a Sol Ultra agent deleted a tester's home directory doing exactly that.
Sol, Terra, Luna — OpenAI meant the Sun, Earth, and Moon. Solana's official account read SOL as its own ticker and Terra/Luna as the $40B 2022 crypto collapse, and said so in two words.
What People Search
Long-tail queries from Google Suggest + Trends. Volume and competition are heuristics — directional, not audited. Content Type comes from query shape.
SERP of term “GPT-5.6 Sol”
What searchers see today — organic results on top, paid ads if anyone's bidding. Ad density is a real-time commercial signal.
FAQ
What is GPT-5.6 Sol?
GPT-5.6 Sol is OpenAI's flagship frontier model — the top tier of a three-model GPT-5.6 family (Sol, Terra, Luna) named after the Sun, Earth, and Moon.
Why is GPT-5.6 Sol emerging now?
OpenAI gated GPT-5.6 Sol behind a government cybersecurity review before its July 9, 2026 general release, then days later a Sol Ultra agent deleted a tester's home directory.
When did GPT-5.6 Sol emerge?
Publicly emerged around 2026-06-26 (about 46 days ago as of 2026-08-11). EarlyTerms first recorded a pipeline signal on 2026-07-11.
Related Terms
Other terms in the same space — aliases, subtypes, competitors, and neighbors to explore next.
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- Competitor claude-fable-5 Claude Fable 5 is Anthropic's first publicly available Mythos-class model, built for long-horizon agentic work, software engineering,… →
- Competitor Claude Mythos Claude Mythos is an unreleased frontier LLM from Anthropic, publicly previewed on April 7, 2026. →
- Competitor claude-mythos Claude Mythos is an unreleased frontier LLM from Anthropic, publicly previewed on April 7, 2026. →
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- Related context window A context window is the span of tokens an LLM reads and reasons over in a single forward pass. →
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- Competitor Inkling Inkling is Thinking Machines Lab's first open-weights large language model: a 975-billion-parameter Mixture-of-Experts system with 41B… →
- Competitor Kimi Model "Kimi model" is the umbrella term for Moonshot AI's family of large language models, spanning the original 2023 chatbot through K1.5,… →
- Includes Sol Pro GPT-5.6 Sol Pro is the maximum reasoning-effort mode of OpenAI's flagship GPT-5.6 Sol model, reserved for ChatGPT Pro and Enterprise… →
- Related Tokenless Tokenless is a YC S26-backed API router that fans a single request out to several LLMs at once, tracks each one's confidence… →
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Sources
Primary URLs this report cites — open any to verify the claim yourself.
- 01 OpenAI — Previewing GPT-5.6 Sol openai.com ↗
- 02 OpenAI — GPT-5.6 (general availability) openai.com ↗
- 03 OpenAI API — GPT-5.6 Sol model docs developers.openai.com ↗
- 04 CNBC — OpenAI's newest model is 54% more token efficient, Altman tells CNBC cnbc.com ↗
- 05 METR — Summary of predeployment evaluation of GPT-5.6 Sol metr.org ↗
- 06 Simon Willison — The new GPT-5.6 family: Luna, Terra, Sol simonwillison.net ↗
- 07 Tech Times — GPT-5.6 Sol's Shell Bug Wiped a Mac techtimes.com ↗
- 08 CCN — OpenAI Names GPT-5.6 Models Sol, Terra, and Luna, Prompting Solana's 'Sam Altcoinman' Response ccn.com ↗
- 09 Hacker News — GPT-5.6 (1,554 points) news.ycombinator.com ↗
- 10 Hacker News — U.S. government will decide who gets to use GPT-5.6 (1,184 points) news.ycombinator.com ↗
- 11 Wikipedia — GPT-5.6 en.wikipedia.org ↗