GPT-5.6
vgpt-5-6-2026-07-09OpenAI
OpenAI's GPT-5.6 family — Sol (flagship, $5/$30), Terra (balanced, $2.50/$15), Luna (fast, $1/$6 per 1M) — previewed 2026-06-26 under US-government-requested partner-only restrictions and publicly released 2026-07-09. Sol posts 88.8% Terminal-Bench 2.1 (91.9% in Ultra mode); Terra is reported GPT-5.5-class at half the price. ~1.5M context reported but unconfirmed. Launch-day evaluation: independent verification is still very limited.
Trust Vector Analysis
Dimension Breakdown
🚀Performance & Reliability+
Launch-day evaluation (public release 2026-07-09). Provider-reported numbers are strong — Sol beats GPT-5.5 on Terminal-Bench 2.1 (88.8% vs 88.0%, 91.9% Ultra) — but nearly everything else, including the ~1.5M context and the Terra-equals-GPT-5.5-at-half-price claim, awaits independent verification. Note the oddity that Luna (84.3%) is reported above Terra (82.5%) on Terminal-Bench 2.1; treat tier orderings as provisional.
Provider-reported benchmarks from the preview announcement and launch coverage; no independent SWE-bench-style replication exists yet on public release day
Provider positioning and preview-partner reports; quantitative reasoning benchmarks (GPQA, ARC-AGI-2 class) not yet independently published for the family
Launch coverage review; the Terra-equals-GPT-5.5 claim is provider/partner-reported and not yet independently verified
Preview-partner reports only; no public repeated-run consistency data on launch day
Provider/partner statements; no public latency distribution data exists on release day
95th percentile latency requires post-launch measurement; will vary with reasoning effort and Ultra mode
Secondary-source reports; official platform documentation had not published a definitive figure at evaluation time
Platform uptime baseline; model-specific score held down because public availability began today
🛡️Security+
The unusual government-requested vetted-partner preview (2026-06-26 to 2026-07-09, ~20 partners, tied to the Cyber EO framework) means the family received extra pre-release scrutiny — but those evaluation results are not public, and independent red-teaming has barely begun. OpenAI has publicly opposed making per-customer government approval permanent.
Inherited safety-stack review; no third-party OWASP LLM01 testing published for GPT-5.6 at launch
Review of the pre-release restricted evaluation period and provider safety statements; the extra scrutiny window is a modest positive signal, but results are not public
Analysis of privacy policies and data handling practices
Safety-stack review plus staged-rollout assessment; full system-card detail for the family was thin on public release day
Review of API security features and best practices
🔒Privacy & Compliance+
Standard OpenAI enterprise posture, identical to GPT-5.5: SOC 2/ISO 27001, no API-data training by default, 30-day default retention with zero-retention options. Not HIPAA eligible.
Review of enterprise documentation
Policy review of data usage terms
Terms of service and enterprise documentation review
Review of data protection capabilities
Verification of compliance certifications
Enterprise feature review
👁️Trust & Transparency+
Launch documentation is thinner than OpenAI's GPT-5.5 standard: pricing and tiering are clear, but the context window (~1.5M) and knowledge cutoff (~May 2026) remain unconfirmed by official docs, and the government-linked preview evaluations are not public.
Evaluation of reasoning transparency and explanation capabilities
Inherited-lineage assessment; no independent factual-QA measurement exists on public release day
Bias benchmark disclosure review; family-specific data pending
Qualitative assessment; launch-day confidence necessarily low
Documentation completeness review against OpenAI's own GPT-5.5 baseline
Review of public disclosures about training data
Analysis of built-in safety mechanisms
⚙️Operational Excellence+
OpenAI's operational machine is mature, but the GPT-5.6 family is hours old publicly: expect fast-moving docs, integration lag, and possible regulatory follow-on from the Cyber EO framework. Sol on Cerebras (up to 750 tok/s) is a July rollout, not universal.
Review of API design, consistency, and feature completeness
SDK quality, documentation, and maintenance review
Review of versioning policy; the three-tier naming (Sol/Terra/Luna) is new and its long-term versioning behavior is unproven
Review of available monitoring tools and metrics
Support and documentation assessment
Availability-surface analysis; ecosystem score held down because public access began today and third-party integrations are still switching over
Review of licensing terms; slight residual uncertainty from the Cyber EO framework (2026-08-01 deadline) and potential future access conditions
- +Three clean price tiers: Sol $5/$30 (flagship), Terra $2.50/$15, Luna $1/$6 per 1M tokens
- +Sol beats GPT-5.5 on Terminal-Bench 2.1 (88.8% vs 88.0%; 91.9% in Ultra subagent mode)
- +Terra reported to deliver GPT-5.5-class capability at half the price
- +Reported ~1.5M token context would be class-leading (unconfirmed)
- +Extra pre-release scrutiny via the US-government-requested vetted-partner preview
- +Sol on Cerebras at up to 750 tokens/s rolling out through July 2026
- +Same mature Responses API/SDK surface as GPT-5.5 — trivial migration
- !Publicly released today (2026-07-09) — essentially no independent benchmarks, latency data, or production track record
- !Headline ~1.5M context and ~May 2026 knowledge cutoff are reported but not officially confirmed
- !Terra-equals-GPT-5.5-at-half-price claim is provider/partner-sourced and unverified
- !Reported tier ordering is inconsistent (Luna 84.3% vs Terra 82.5% on Terminal-Bench 2.1) — treat tier choices as provisional
- !Regulatory overhang: launched under the US Cyber EO framework (2026-08-01 deadline); access conditions could evolve
- !Not HIPAA eligible; 30-day default API retention
- !Launch documentation thinner than OpenAI's GPT-5.5 standard
Use Case Ratings
code generation
Sol's 88.8% Terminal-Bench 2.1 (91.9% Ultra) edges GPT-5.5, and Luna offers surprising coding value at $1/$6 — but all numbers are provider-reported on launch day.
customer support
Terra ($2.50/$15) and Luna ($1/$6) give attractive support tiers if the GPT-5.5-class claim for Terra holds; wait for independent verification before large migrations.
content creation
Expected to match or exceed GPT-5.5's strong drafting; family-specific writing evaluations not yet available.
data analysis
Sol targets demanding analytical work, and the reported ~1.5M context would be class-leading — but that figure is unconfirmed.
research assistant
Promising for literature-scale work if the context claim verifies; GPT-5.5 remains the battle-tested choice this week.
legal compliance
Standard OpenAI compliance posture (SOC 2, zero-retention options, not HIPAA eligible); day-one models are a hard sell for conservative legal teams.
healthcare
Not HIPAA eligible, and no clinical validation exists for a model released today.
financial analysis
Sol's max-effort reasoning targets exactly this workload; quantitative benchmark verification still pending.
education
Luna's $1/$6 pricing could make high-volume tutoring very economical; content-quality validation pending.
creative writing
No family-specific creative evaluations yet; inherits GPT-5.5's strong narrative baseline with its conciseness bias.