GPT-5.6 Luna: Replit expands access to software creation with GPT-5.6 Luna

OpenAI released GPT-5.6 Luna via its API on July 9, 2026, with vendor-reported HealthBench Professional score of 55.7, HealthBench score of 55.8, HealthBench Hard score of 32, and HealthBench Consensus score of 95.1. The model also scored 73.16 on BenchLM.ai's Coding leaderboard (#6), 53.32 on Agentic (#44), 81.5 on Knowledge (#12), 66.1 on Multimodal Grounded (#18), and 22.7 on Epoch AI's GDP.pdf benchmark.

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 .