GPT 5.6 Luna vs GPT 5.6 Sol
Specs, pricing, and capabilities side by side — plus outputs generated from identical prompts, so the only variable between the columns is the model.
OpenAI's fastest, most affordable GPT-5.6 tier — for high-volume, latency-sensitive, and budget-conscious workloads.
Learn more about GPT 5.6 Luna →OpenAI's flagship GPT-5.6 tier — leads the family on every benchmark, for frontier coding, long-horizon agentic work, and research.
Learn more about GPT 5.6 Sol →An API is a set of rules that lets different software programs communicate. It tells one program how to request information or actions from another, and describes the format of the response. For example, a weather app can use an API to request current conditions from a weather service.
An API is a set of rules that lets one piece of software ask another for information or actions. For example, a weather app may use an API to request today’s forecast from a weather service, then display the result for you.
Use a reputable hosted authentication provider rather than building authentication yourselves. For a two-person startup, this reduces security risk, accelerates launch, and avoids maintaining password storage, account recovery, multifactor authentication, session management, compliance controls, and defenses against evolving attacks. Choose a provider with strong security practices, clear pricing, data-export capabilities, good documentation, and support for standards such as OAuth 2.0, OpenID Connect, and WebAuthn. Keep your application’s authorization logic and user data model independent of the provider so switching remains feasible. The strongest argument against this recommendation is vendor dependency: an outage, price increase, policy change, account suspension, or migration difficulty could disrupt your product and limit your control over a critical capability. This risk is manageable through standards-based integration, backups of necessary user metadata, documented migration procedures, and, where justified, a secondary authentication path.
Use a reputable hosted authentication provider. For a two-person startup, authentication is security-critical but rarely differentiating, and building it well requires ongoing work across password storage, account recovery, MFA, session management, abuse prevention, compliance, monitoring, and incident response. A provider lets you launch faster and reduces the chance that a subtle implementation flaw compromises users. Choose one with standards-based integrations and an export path to limit lock-in. The strongest argument against this recommendation is vendor dependency: pricing can rise sharply with user growth, and migrating authentication later can be difficult because password hashes, MFA credentials, sessions, and identity links may not transfer cleanly.
AI spending is difficult to predict because it combines uncertain demand, evolving technology, and usage-based pricing. Unlike traditional software, where a company may buy a fixed number of licenses, AI costs often rise with the volume and complexity of requests. A popular service, longer documents, more frequent analysis, or richer outputs can quickly increase consumption. The technology itself also changes rapidly. New models, tools, and hardware can make an existing approach cheaper, but may require new subscriptions, integration work, staff training, or migration. Forecasts can therefore become obsolete before a budget cycle ends. In addition, AI projects often begin as experiments. Some deliver value and expand quickly; others are stopped after modest spending. It is hard to know which outcome will occur in advance. Infrastructure creates another source of uncertainty. Running AI internally can produce variable costs for computing, storage, electricity, and specialized staff. External providers reduce some operational burdens but introduce price changes, service tiers, and contractual dependencies. Compliance, security, and data preparation can add unexpected expenses. Executives can improve control by separating experimentation from production budgets, setting spending limits and alerts, and tracking cost per business outcome rather than usage alone. Require pilots to define success measures and stopping rules. Negotiate clear pricing terms, review model choices regularly, and maintain alternatives among suppliers. Finally, report AI costs monthly alongside adoption, performance, and realized benefits so forecasts improve with experience.
AI spending is hard to predict because usage, pricing, and implementation costs can all change quickly. Unlike traditional software, many AI services charge according to consumption: the number of questions asked, documents processed, images created, or computing resources used. A successful pilot can therefore become much more expensive when thousands of employees or customers adopt it. A second cause is uncertainty about which technology will be needed. Different AI models vary greatly in price, speed, and quality, while vendors frequently release new versions and revise commercial terms. Teams may also discover that a cheaper model is adequate for routine work but that sensitive or complex tasks require more costly systems. Third, the model itself is only part of the bill. Reliable AI often requires data preparation, system integration, security controls, testing, human review, monitoring, training, and legal or compliance work. These supporting costs are easy to underestimate, particularly when projects move from demonstration to production. Executives can improve control by funding AI in stages, with clear limits and decision points. Require each project to define expected usage, business value, accuracy needs, and total operating cost. Track spending by team and use case, set alerts and quotas, and review actual costs monthly. Negotiate vendor protections, avoid unnecessary dependence on one provider, and maintain contingency budgets for rapid growth, compliance changes, or unexpected technical work.
Every sample is the model’s first result for the shared scene prompt — no cherry-picking — generated via Runware or Replicate. Hover a copy icon to read the full prompt.