# GPT-5.6 Luna: Replit expands access to software creation with GPT-5.6 Luna > Source: > Published: 2026-08-19 00:00:00+00:00 [OpenAI](/providers/openai)GPT-5.6 Luna # Is GPT-5.6 Luna out yet? Yes. ## About GPT-5.6 Luna OpenAI's GPT-5.6 Luna model, tracked with official availability evidence and vendor-reported HealthBench results. How we confirmed it Released via the API July 9, 2026 at 12:00 PM UTC An administrator marked this model available (silently). [Open detection source →](https://openai.com/news/) Release timeline - 2026-07-09T22:47:30.794Z First official availability observed - 2026-07-09T22:47:30.794Z Availability confirmed after the second check Waiting for OpenAI's next model? One click creates your free account (or signs you into an existing one) and turns on alerts for OpenAI releases. There's no password to set, and you can unsubscribe any time. Benchmarks HealthBench Professionalvendor-reported GPT-5.6 Luna · via openai-system-card · captured Jul 10, 2026 · [source](https://deploymentsafety.openai.com/gpt-5-6-preview/gpt-5-6-preview.pdf) 55.7 HealthBenchvendor-reported GPT-5.6 Luna · via openai-system-card · captured Jul 10, 2026 · [source](https://deploymentsafety.openai.com/gpt-5-6-preview/gpt-5-6-preview.pdf) 55.8 HealthBench Hardvendor-reported GPT-5.6 Luna · via openai-system-card · captured Jul 10, 2026 · [source](https://deploymentsafety.openai.com/gpt-5-6-preview/gpt-5-6-preview.pdf) 32 HealthBench Consensusvendor-reported GPT-5.6 Luna · via openai-system-card · captured Jul 10, 2026 · [source](https://deploymentsafety.openai.com/gpt-5-6-preview/gpt-5-6-preview.pdf) 95.1 Coding#6 GPT-5.6 Luna · via BenchLM.ai · captured Aug 20, 2026 · [source](https://benchlm.ai/embed/leaderboard?category=coding) 73.16 Agentic#44 GPT-5.6 Luna · via BenchLM.ai · captured Aug 20, 2026 · [source](https://benchlm.ai/embed/leaderboard?category=agentic) 53.32 Knowledge#12 GPT-5.6 Luna · via BenchLM.ai · captured Aug 20, 2026 · [source](https://benchlm.ai/embed/leaderboard?category=knowledge) 81.5 MultimodalGrounded#18 GPT-5.6 Luna · via BenchLM.ai · captured Aug 20, 2026 · [source](https://benchlm.ai/embed/leaderboard?category=multimodalGrounded) 66.1 GDP.pdf GPT 5.6 Luna · via Epoch AI · captured Aug 20, 2026 · [source](https://epoch.ai/benchmarks/gdp-pdf) 22.7 Sourced metrics mirrored with attribution - not community sentiment. Data from [BenchLM.ai](https://benchlm.ai). Data from [Epoch AI, “AI Benchmarking Hub”](https://epoch.ai/benchmarks) (CC BY 4.0). Vibe rating How this model actually feels to use, rated by the people here. No vibe ratings yet. Be the first. [Sign in](/signin) to rate this model. Model Pulse How is this model behaving today? One check-in per person per day: the running record of “did they nerf it”. Resets at midnight UTC. No check-ins yet today. Be the first to log how this model is behaving. [Sign in](/signin) Community consensus An AI summary of the public comments here. Not a sourced fact. Not enough public feedback yet to summarize. Add a comment to help build the picture. OutYet reporting [GPT-5.6 Sol's ChatGPT update is a product-layer change, not an API revision](/news/gpt-5-6-sol-s-chatgpt-update-is-a-product-layer-change-not-an-api-revision)OpenAI says it has altered the ChatGPT behavior of GPT-5.6 Sol while leaving its Work and Codex version unchanged. The distinction matters more to developers than the presentation-level reliability claims. [GPT-5.6 Sol gets a ChatGPT-specific tuning pass, not a new Work or Codex model](/news/gpt-5-6-sol-gets-a-chatgpt-specific-tuning-pass-not-a-new-work-or-codex-model)OpenAI's August 6 update changes GPT-5.6 Sol behavior inside ChatGPT and adds an effort control, while explicitly leaving the Work and Codex versions untouched. [GPT-5.6 Sol gets a faster lane while OpenAI cuts prices below it](/news/gpt-5-6-sol-gets-a-faster-lane-while-openai-cuts-prices-below-it)OpenAI's latest GPT-5.6 update leaves Sol's standard API price intact but replaces Priority Processing with Fast mode, while lower-tier Terra and Luna receive substantial price reductions. [GPT-5.6 Sol on Bedrock makes prompt-cache placement a deployment decision](/news/gpt-5-6-sol-on-bedrock-makes-prompt-cache-placement-a-deployment-decision)AWS has added explicit prompt caching for the GPT-5.6 family on Bedrock, giving teams control over which repeated agent context is reused and making cache telemetry part of production tuning. [GPT-5.6 Sol on Bedrock adds explicit prompt caching for repeated agent context](/news/gpt-5-6-sol-on-bedrock-adds-explicit-prompt-caching-for-repeated-agent-context)The new Bedrock option changes how Sol users can manage repeated prompt prefixes, but the savings depend on deliberate cache placement and real workload reuse. [GPT-5.6’s latest change is about operating cost, not a new model tier](/news/gpt-5-6-s-latest-change-is-about-operating-cost-not-a-new-model-tier)OpenAI has reduced GPT-5.6 Luna and Terra pricing and replaced priority processing for Sol with Fast mode. AWS’s new Bedrock integration adds a concrete path to capture repeated-context savings, but the benefit depends on workload shape. [AWS's GPT-5.6 guide makes the deployment trade-offs more concrete](/news/aws-s-gpt-5-6-guide-makes-the-deployment-trade-offs-more-concrete)A new Amazon Bedrock implementation guide clarifies how GPT-5.6 Sol, Terra, and Luna fit into an AWS-controlled inference path, including the regions, caching mechanics, and retention caveat engineers need to evaluate. [GPT-5.6 Sol reaches Amazon Bedrock with a different operational contract](/news/gpt-5-6-sol-reaches-amazon-bedrock-with-a-different-operational-contract)AWS has added the GPT-5.6 family to Bedrock through an OpenAI-compatible Responses API. The change matters most to teams that need AWS identity, regional processing, and observability around agentic workloads. [AWS Adds GPT-5.6 Sol to Bedrock With an OpenAI-Compatible Path](/news/aws-adds-gpt-5-6-sol-to-bedrock-with-an-openai-compatible-path)Amazon Bedrock now exposes GPT-5.6 Sol, Terra, and Luna through a dedicated OpenAI Responses API endpoint. The useful story for engineering teams is not merely another hosting option, but the operational differences in context limits, credentials, caching, and data handling. [GPT-5.6 Sol on Bedrock is a deployment option, not a new model generation](/news/gpt-5-6-sol-on-bedrock-is-a-deployment-option-not-a-new-model-generation)AWS has made GPT-5.6 Sol, Terra, and Luna generally available through Amazon Bedrock. The practical change is a new route for teams that need AWS-native identity, regional processing, and quota management while retaining the OpenAI Responses API. [GPT-5.6 Sol gains a Bedrock route, but deployment is not a zero-config switch](/news/gpt-5-6-sol-gains-a-bedrock-route-but-deployment-is-not-a-zero-config-switch)AWS has added GPT-5.6 Sol, Terra, and Luna to Bedrock through a distinct OpenAI-compatible endpoint, creating a practical deployment option with regional, authentication, and integration constraints. [GPT-5.6 Sol on Bedrock is a distinct API surface, not a simple model switch](/news/gpt-5-6-sol-on-bedrock-is-a-distinct-api-surface-not-a-simple-model-switch)AWS’s Bedrock guidance makes GPT-5.6 Sol practical for existing AWS estates, but its endpoint, regional scope, caching rules, and supported interfaces require deliberate integration work. [AWS gives GPT-5.6 an enterprise integration path through Bedrock](/news/aws-gives-gpt-5-6-an-enterprise-integration-path-through-bedrock)AWS has documented GPT-5.6 Sol, Terra, and Luna for Amazon Bedrock, pairing the model family with regional inference, IAM controls, and explicit prompt-cache breakpoints. The material change is an additional deployment surface, with region and data-retention constraints that technical teams still need to assess. [AWS adds GPT-5.6 models to Bedrock, with caching and region limits](/news/aws-adds-gpt-5-6-models-to-bedrock-with-caching-and-region-limits)The Bedrock route brings GPT-5.6 Sol, Terra, and Luna to AWS customers through the Responses API. The practical details are the cache controls, data-handling terms, and uneven regional footprint. [GPT-5.6 Sol reaches Amazon Bedrock with cache economics and regional constraints](/news/gpt-5-6-sol-reaches-amazon-bedrock-with-cache-economics-and-regional-constraints)AWS has made OpenAI's GPT-5.6 family available through Bedrock, giving AWS-standardized teams an OpenAI-compatible route with meaningful configuration and data-handling tradeoffs. [AWS adds GPT-5.6 tiers to Bedrock, with regional and routing constraints](/news/aws-adds-gpt-5-6-tiers-to-bedrock-with-regional-and-routing-constraints)The new Bedrock path gives AWS customers GPT-5.6 Sol, Terra, and Luna through existing cloud controls, but the flagship tier has a narrower regional footprint and the performance case remains provider-reported. [GPT-5.6 Sol on Bedrock turns model choice into an AWS architecture decision](/news/gpt-5-6-sol-on-bedrock-turns-model-choice-into-an-aws-architecture-decision)Amazon Bedrock now offers OpenAI's GPT-5.6 tiers through the Responses API, pairing Sol's high-reasoning setting with AWS-specific controls for regional execution, identity, auditing, and prompt caching. [AWS adds a new deployment path for GPT-5.6 workloads](/news/aws-adds-a-new-deployment-path-for-gpt-5-6-workloads)AWS's GPT-5.6 Bedrock announcement is chiefly an operational change: teams can weigh region, caching, identity controls, and existing AWS commitments alongside model tier and benchmark claims. [AWS adds GPT-5.6 Sol, Terra, and Luna to Amazon Bedrock](/news/aws-adds-gpt-5-6-sol-terra-and-luna-to-amazon-bedrock)AWS says the GPT-5.6 family is available through Bedrock, adding a cloud-platform route shortly after OpenAI's own general-availability announcement. [Compare GPT-5.6 Luna with another model →](/compare?models=gpt-5-6-luna) Also waiting on: [Gemini 3.5 Pro](/models/gemini-3-5-pro), [Claude Fable 5.1](/models/claude-fable-5-1), [Claude Mythos 5.1](/models/claude-mythos-5-1), [GLM-6](/models/glm-6) ## Comments Missing a model, or wishing OutYet did something it doesn't? [Tell us what to build](/submit).