OpenAI DevDay Launches GPT-6.1 Sol and Ultrafast Speed Tier

On 09-30, OpenAI launched a high-speed inference tier called Ultrafast, for the first time offering it across its entire product line: it's available via API, ChatGPT, and Codex.

Confirmed

• Speed: token generation in Codex is up to 8x faster (300 tokens/second), and up to 6x faster via the API; multiple posters (@cneuralnetwork, @YashasGunderia, @kimmonismus) consistently confirmed roughly an 8x speedup, reaching about 300 tokens/s.
• Pricing: the Ultrafast tier costs roughly 6x the standard mode.
• Coverage: @YashasGunderia said the tier is rolling out across six entry points spanning API, ChatGPT, and Codex; @kimmonismus noted that Ultrafast versions of GPT-6 Astra and GPT-6.1 Sol are already live.

Unconfirmed

• @kimmonismus speculated that Ultrafast's speedup is powered by Cerebras hardware; this is the poster's personal guess and was not directly confirmed in official posts.

Why it matters

• This is the first time OpenAI has offered an ultra-low-latency tier as a standard option across its entire product line—ideal for latency-sensitive use cases, though users must weigh the speed-versus-cost tradeoff.

2026-09-30 ~ 2026-09-30 · 56 related posts

Full story(15 episodes)→

• Episode 1: OpenAI Launches GPT-6 Sol and Luna at Half Price; Big Hallucination Gains but Not a Clean Sweep(2026-09-23, 92 posts)
• Episode 2: GPT-6 Sol/Luna launch splits opinion: half-price but dumber?(2026-09-23, 9 posts)
• Episode 3: LMArena Opens GPT-6 Sol and Luna for Public Testing(2026-09-23, 2 posts)
• Episode 4: Four New Models Reshape the Cost-Performance Frontier, Opus 5.5 Tops Intelligence Index(2026-09-23, 2 posts)
• Episode 5: OpenAI and Anthropic Slash Prices Within 90 Minutes, Kicking Off a New Model Price War(2026-09-23, 7 posts)
• Episode 6: Tests Show GPT-6 Sol Scales Nearly Linearly With Effort(2026-09-23, 3 posts)
• Episode 7: GPT-6 Astra Tops Bug Hunt Bench While Sol Version Regresses(2026-09-24, 2 posts)
• Episode 8: Leaks Map GPT-6 Codenames to GPT-5.6 Versions(2026-09-24, 3 posts)
• Episode 9: Bug Hunt Bench Ranks Frontier Coding Models on 105 Real Bugs with 200x Cost Gap(2026-09-24, 3 posts)
• Episode 10: GPT-6 Sol and Luna Launch With Aggressive API Pricing(2026-09-25, 2 posts)
• Episode 11: OpenAI's efficient GPT-6 models seen as freeing compute for bigger frontier models(2026-09-25, 2 posts)
• Episode 12: GPT-6 Sol Underestimated: 1.6x Robot Task Gains at 47% Lower Cost(2026-09-25, 2 posts)
• Episode 13: OpenAI DevDay Launches GPT-6.1 Sol and Ultrafast Speed Tier(2026-09-30, 56 posts)
• Episode 14: GPT-6 Astra Ultrafast Reportedly 8x Faster in Codex(2026-09-30, 2 posts)
• Episode 15: GPT-6.1 Sol nears Astra-level intelligence at a fraction of the price(2026-09-30, 13 posts)

• OpenAI rolls out GPT-6.1 Sol in Codex and ChatGPT Work: near-Astra performance, lower cost — testingcatalog · 2026-09-30
• OpenAI launches GPT-6.1 Sol with near-Astra performance at lower cost — acoolrandomusername · 2026-09-30
• Early users hail GPT-6.1-Sol as 'insanely efficient' at computer use — adonis_singh · 2026-09-30
• OpenAI launches GPT-6.1 Sol at one-fifth of Astra's price, cached input down 95% — BitterAd6419 · 2026-09-30
• OpenAI's New Ultrafast Tier: Up to 8x Faster Codex at 300 Tokens/sec for Pro 500 Plans — testingcatalog · 2026-09-30
• GPT-6.1 Sol is now live in the ChatGPT app — mallow610 · 2026-09-30
• "GPT Sol 6.1: Astra-level intelligence at 1/5 the price" — community reacts to pricing pace — danshipper · 2026-09-30
• GPT 6.1 Sol is out — how will it stack up against Opus 5.5? — rudrank · 2026-09-30
• Claim: GPT-6.1 Sol Is 5x Cheaper Than Astra with Nearly Equal Performance — cneuralnetwork · 2026-09-30
• OpenAI's Ultrafast mode: 8x faster, 6x the price — rudrank · 2026-09-30
• GPT-6.1 Sol Nearly Matches GPT-6 Astra at a Much Lower Price — iScienceLuvr · 2026-09-30
• GPT-6.1 Sol and Ultrafast Announced — soumitrashukla9 · 2026-09-30
• GPT-6.1 Sol Ultrafast Goes Live: Up to 300 token/s, 8x Faster at 6x the Price — kimmonismus · 2026-09-30
• OpenAI launches Ultrafast across API, ChatGPT, and Codex — YashasGunderia · 2026-09-30
• All models get ultrafast: ~300 tps, 8x faster but 6x more expensive — cneuralnetwork · 2026-09-30
• OpenAI launches Cerebras-powered ultrafast tier: 8x speed for 6x price — downingARK · 2026-09-30
• OpenAI Ultrafast detailed: 8x faster at 6x price, up to 300 tok/s, Cerebras-powered — kimmonismus · 2026-09-30
• OpenAI Ultrafast mode announced: 8x speed, 6x price, crowd boos — ethotopia · 2026-09-30
• [source] OpenAI launches GPT-6.1 Sol: near-Astra intelligence at a fifth of the price — OpenAI · 2026-09-30
• GPT-6.1 Sol rolls out to all paid ChatGPT tiers and Codex today — OpenAI · 2026-09-30
• GPT-6.1 Sol nears Astra intelligence at 1/5 the token price; Pro 500 offers 25x Plus usage — TheTuringPost · 2026-09-30
• GPT-6.1 Sol pricing revealed: $2/$10 per million input/output tokens — bindureddy · 2026-09-30
• OpenAI DevDay: GPT 6.1 arrives 8x faster at 6x the price, plus a new $500/mo plan — altryne · 2026-09-30
• Hands-on demo shows OpenAI's Ultrafast is impressively fast at work — testingcatalog · 2026-09-30
• GPT-6.1 Sol reportedly launching today: nearly as strong as Astra, much cheaper — mark_k · 2026-09-30
• GPT-6.1 Sol matches Astra on DeepSWE at ~1/5 the cost: $2 input, $10 output — reach_vb · 2026-09-30
• GPT-6.1 Sol hits 75.2% on DeepSWE v1.1 at ~76% lower per-task cost — OpenAIDevs · 2026-09-30
• OpenAI's GPT-6.1 Sol posts big agent benchmark gains at ~76% lower cost — OpenAIDevs · 2026-09-30
• GPT-6.1 Sol cuts factual errors by 32%, matches Astra at one-seventh the cost — OpenAIDevs · 2026-09-30
• OpenAI positions GPT-6.1 Sol as near-Astra intelligence for a fifth of the price — OpenAIDevs · 2026-09-30
• OpenAI DevDay rumored to unveil GPT-6.1 with 8x speedup and Decisions API preview — ghumare64 · 2026-09-30
• [source] OpenAI's Ultrafast goes live with Pro 500 plan offering 25x Plus usage limits — OpenAI · 2026-09-30
• Sam Altman launches 6.1 Sol: near-Astra intelligence at 1/5th the price with 95% cache-read discount — sama · 2026-09-30
• OpenAI launches Codex Ultrafast: up to 8x faster than Astra Standard — OpenAIDevs · 2026-09-30
• OpenAI Launches 'Ultrafast' Codex Tier, 8x Faster — Devs Say Nobody Can Afford It — jarrodwatts · 2026-09-30
• DevDay Deep Dive: Dots Demo Stalls Live, GPT-6.1 Sol Cuts Costs, Ultrafast Sells Speed — AGI Hunt · 2026-09-30
• OpenAI launches GPT-6.1 Sol and a $500/month ChatGPT Pro plan with 25x Plus usage — ebytes111 · 2026-09-30
• OpenAI launches GPT-6.1Sol: near-Astra intelligence at 1/5 the price, cache reads at $0.10/M tokens — 新智元 · 2026-09-30
• OpenAI's GPT-6.1 Sol system card rates the model Critical in cybersecurity — maksym_andr · 2026-09-30

11 near-duplicate retellings: ethotopia · downingARK · tokenbender · xiaohu · Polymarket · Polymarket · OpenAIDevs · OpenAI · polynoamial · OpenAIDevs · OpenAI