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GPT-6 Sol: Release Date, API Pricing and Latest Status

Track GPT-6 Sol release date, API model ID, pricing, latest status, and how it may differ from GPT-6 Astra and GPT-5.6 Sol.

GPT-6 SolOpenAI APIrelease dateAPI pricingGPT-6 AstraAPIMaster

Published 2026-09-16 · Updated 2026-09-18

Quick Answer

OpenAI has not officially announced GPT-6 Sol as of September 19, 2026. GPT-6 is already available through the officially documented gpt-6-astra model, while the current officially available Sol tier remains gpt-5.6-sol.

The GPT-6 Sol name is circulating because developers claim that some GPT-5.6 Sol requests have been quietly routed to a faster model they identify as "Sol 6." Other posts show alleged coding and frontend-generation results and suggest a lower-cost GPT-6 tier may arrive soon. None of those reports provides an official model page, public API model ID, price table, or reproducible routing proof.

The community expectation of a Thursday, September 17 launch did not materialize. Later that day, Sam Altman wrote: "the main thing i was excited about launching this week will be next week instead, but imo worth the wait!" This confirms that one important planned launch moved from this week to next week, but the post does not name GPT-6 Sol.

Some community accounts now interpret that delay as a sign that GPT-6 Sol may be the postponed launch. That is still an inference, not an OpenAI announcement. There is no confirmed GPT-6 Sol date; OpenAI DevDay on September 29 remains an official event date, but OpenAI has not tied the model to it.

Need a GPT API today? Use the confirmed GPT-6 Astra API, or use the current GPT-5.6 Sol, Terra and Luna routes. Do not build production traffic around GPT-6 Sol until there is a verified model ID. On APIMaster, gpt-6-astra is listed roughly 93% below OpenAI's reference price, and the GPT-5.6 Sol and Terra routes roughly 95% below (Luna about 91%); route prices follow channel supply, so check the live card before committing volume. One APIMaster key covers all of them — create one and call GPT-6 Astra and GPT-5.6 Sol from the same OpenAI-compatible endpoint. Prices checked September 18, 2026.

First published September 16, last checked September 19, 2026.

Current status

Question Answer as of September 19, 2026
Has OpenAI announced GPT-6 Sol? No
Is GPT-6 already released? Yes, the confirmed GPT-6 model is gpt-6-astra
What is the current official Sol model? gpt-5.6-sol
Is there a confirmed GPT-6 Sol API model ID? No
Is GPT-6 Sol pricing available? No
Is there a confirmed release date? No; the September 17 community prediction did not happen, and September 29 remains unconfirmed for GPT-6 Sol
What evidence exists? Developer routing claims, developer-reported gpt-6-sol model fields, reported timings, alleged coding demos, launch speculation, and Sam Altman's confirmation that one important launch moved to next week

What is confirmed, and what is not?

Confirmed

  • OpenAI has released GPT-6 Astra, with the documented API model ID gpt-6-astra.
  • GPT-5.6 Sol is the current released Sol-tier model.
  • OpenAI DevDay 2026 is scheduled for September 29 in San Francisco.
  • On September 15, Sam Altman posted "big ship this week" and pointed to more launches for DevDay. OpenAI's Tibo Sottiaux separately described this week as having a DevDay-level volume of launches.
  • On September 17, Sam Altman said the main thing he expected to launch that week would instead arrive the following week. He did not identify the product.
  • OpenAI has announced that GPT-5.5 will leave ChatGPT, ChatGPT Work, and Codex on October 14, telling users to move to GPT-5.6 Sol or GPT-6 Astra. That official migration language does not mention GPT-6 Sol.

Not confirmed

  • That GPT-5.6 Sol traffic is actually being served by GPT-6 Sol.
  • That the model shown in community coding videos is GPT-6 Sol.
  • That the delayed launch Sam Altman described is GPT-6 Sol, or that GPT-6 Sol will launch at DevDay.
  • That its intelligence will sit just below Astra, or that its price will match GPT-5.6 Sol.
  • Any public API model ID, context window, benchmark result, token price, or APIMaster route.

Sam Altman's and Tibo Sottiaux's posts support the expectation of near-term OpenAI releases, but neither names GPT-6 Sol. Their original posts are linked in the Sources section rather than treated as direct product evidence.

GPT-6 Sol release timeline

Date Signal What it establishes
September 14 A community account claimed GPT-5.6 Sol requests were already reaching GPT-6 Sol A circulating developer claim, not verified routing evidence
September 15 A developer claimed selected users were being routed from 5.6 Sol to "Sol 6" and described it as faster First-person community feedback without an official model identifier or reproducible test
September 15 Sam Altman and Tibo Sottiaux signaled a heavy release week OpenAI launches are likely, but no product name was given
September 15-16 Community posts suggested Thursday, September 17, while others pointed to DevDay Competing release-date guesses; neither is confirmed
September 17 The community's Thursday GPT-6 Sol expectation did not materialize The missed prediction is not evidence that the model was released or cancelled
September 17 Sam Altman said the main launch he expected that week would move to the following week A real OpenAI launch was delayed; the post does not identify it as GPT-6 Sol
September 16 36Kr/机器之心 summarized the GPT-6 Sol discussion Secondary reporting that explicitly notes the lack of OpenAI confirmation
September 29 OpenAI DevDay 2026 The event date is official; a GPT-6 Sol launch there is not

The most important distinction is between a real OpenAI release window and an inferred model name. The former has support from OpenAI employees; the latter currently comes from community reports.

Community reports

Responses labelled gpt-6-sol

Developer @chetaslua wrote that GPT-5.6 Sol was routing to "Sol 6" for a small number of users and described the result as unusually fast and heavily reinforcement-learned. Another account, @1999_eth, similarly claimed that many GPT-5.6 Sol requests were already reaching GPT-6 Sol and predicted Astra-adjacent capability at GPT-5.6 Sol pricing.

Later reports add a more specific detail. Developers who target gpt-5.6-sol — directly, through Codex, or through a gateway — describe responses whose model field reads gpt-6-sol. Reported timings point the same way: a zero-shot pixel-art sandbox run at max effort took roughly 15 minutes and about 60k tokens and was described as clearly below Astra but fast, while a single SVG prompt ran in about 3 minutes and roughly 28k tokens against about 19 minutes and 25k tokens on Astra — the pair behind the "about six times faster" figure now circulating. A separate offline knowledge-cutoff test put the model ahead of gpt-5.6-sol, and one developer testing image composition reported being routed to "gpt 6 sol" and judged the output sound.

A returned model identifier is a more concrete observation than a speed impression, because it names a string produced by the serving stack. It still does not identify the model: the model field is written by the provider, and a gateway, relay, or router can set it independently of the model that generated the response. These reports establish that some routes advertise gpt-6-sol. They do not establish that OpenAI has released a model by that name, and the timing comparisons are single-prompt observations with no control for provider load, queueing, or sampling settings.

Alleged coding and frontend results

A community demo posted by @Mr_Salio was presented as a leaked model producing a strong frontend result, with claims that it locally outperformed Astra on coding and would cost less. The short video is not a reproducible benchmark: it does not establish the model's identity, system prompt, tool setup, sampling settings, number of attempts, or scoring method.

The useful takeaway is narrower: developers are expecting a GPT-6 everyday tier that preserves much of Astra's coding ability while improving latency and cost. Whether GPT-6 Sol meets that expectation can only be tested after a stable model ID and repeatable access path exist.

Release-date speculation

Sam Altman's September 15 post says OpenAI has a major shipping week followed by multiple DevDay launches. Tibo Sottiaux's post independently reinforces the volume of near-term launches. A separate, unofficial account claimed GPT-6 Sol would arrive on Thursday, September 17.

That Thursday prediction did not happen. In a September 17 update from Sam Altman, he wrote: "the main thing i was excited about launching this week will be next week instead, but imo worth the wait!" The post makes the delay official, but it does not say what moved. Community accounts have connected it to GPT-6 Sol because of the prior routing reports and missed Thursday expectation; that connection remains community speculation. September 29 is the confirmed DevDay date, but associating GPT-6 Sol with DevDay is also speculation until OpenAI names the model.

GPT-6 Sol vs GPT-6 Astra vs GPT-5.6 Sol

Model Current status Likely role Confirmed API ID Confirmed public price
GPT-6 Astra Released Highest-capability GPT-6 tier for difficult reasoning, coding, research and tool use gpt-6-astra Yes
GPT-5.6 Sol Released Current Sol tier for demanding agentic work gpt-5.6-sol Yes
GPT-6 Sol Unannounced Community expects a faster, cheaper everyday GPT-6 tier below Astra None None

The expected positioning is plausible because OpenAI already uses Sol as a tier name in the GPT-5.6 family. It is not proof that OpenAI will preserve the name, ship it in GPT-6, or keep the same price relationship.

Read the full GPT-6 Sol vs GPT-6 Astra comparison for the side-by-side status of both models, what the community reports can and cannot establish, the pricing comparison between the two models that are actually released, a selection guide, and the test plan to run once a Sol route becomes callable. The two confirmed reference points are the GPT-6 Astra API and pricing guide and the released GPT-5.6 Sol, Terra and Luna guide.

GPT-6 Sol API availability

There is no verified public GPT-6 Sol API model ID yet. Do not configure production applications with guessed identifiers such as gpt-6-sol until that exact value appears in official documentation or a provider's live model catalog and successfully completes a test request.

When an API route appears, verify at least four things before sending production traffic:

  1. The model ID returned by the API, not only the label shown on a marketplace card.
  2. The endpoint and feature set, including Responses API, streaming, tools, structured output, images, and reasoning controls.
  3. The route's measured latency, success rate, and behavior on a saved evaluation set.
  4. Billing for input, cached input, output, retries, and long-context requests.

This tracker does not mark GPT-6 Sol as available. Use the live model marketplace for current availability and the model fingerprint tester when a route becomes callable.

GPT-6 Sol pricing expectations

No GPT-6 Sol price has been announced. The released models below are reference points, not a GPT-6 Sol quote:

Reference model Official role Published input / output price per 1M tokens
GPT-5.6 Sol Current flagship Sol tier $5 / $30
GPT-6 Astra Highest-capability GPT-6 tier $10 / $50

Community predictions that GPT-6 Sol will retain GPT-5.6 Sol pricing are unverified. OpenAI could change the tier gap, cache rates, long-context charges, batch discounts, or access rules. The first reliable price will be the official price table paired with a callable model ID; provider prices should then be checked separately because routes and discounts can differ.

What developers should test after launch

Once GPT-6 Sol is officially available, a useful comparison should hold the prompt, tools, input files, reasoning setting, and acceptance criteria constant across GPT-5.6 Sol, GPT-6 Sol, and GPT-6 Astra.

Workload Measure
Multi-file coding change Tests passed, regressions introduced, retries, completion time and total cost
Frontend generation Requirements met, responsive behavior, accessibility, visual defects and repair turns
Tool-using agent Successful tool sequence, recovery from errors, latency and token use
Long-context analysis Citation accuracy, missed facts, unsupported claims and cost
High-volume routine work Throughput, p95 latency, error rate and cost per accepted output

That test will show whether GPT-6 Sol is a true everyday alternative to Astra or simply a different latency and price tier.

FAQ

Is GPT-6 Sol released?

No official GPT-6 Sol release has been announced as of September 19, 2026. GPT-6 Astra is released, and GPT-5.6 Sol remains the current official Sol model.

Is GPT-5.6 Sol secretly routing to GPT-6 Sol?

Some requests to gpt-5.6-sol have reportedly returned a model field of gpt-6-sol, alongside materially faster timings. That is a concrete observation and a legitimate reason to test the route, but it does not identify the backend model: the model field is written by the provider and can be set by a gateway or relay independently of what generated the response. See the Sol vs Astra comparison.

Is GPT-6 Sol the same as GPT-5.6 Sol?

No. GPT-5.6 Sol is a released model. GPT-6 Sol is an unannounced name currently used in community reports. Treat them as different until OpenAI documents the relationship.

When will GPT-6 Sol be released?

There is no confirmed date. The September 17 community prediction did not happen. Sam Altman has said one important launch moved to the following week, but did not name it; community accounts speculate that it could be GPT-6 Sol. OpenAI has confirmed DevDay for September 29 but has not connected GPT-6 Sol to the event.

Will GPT-6 Sol be cheaper than GPT-6 Astra?

That is the leading community expectation because Sol is positioned below Astra and GPT-5.6 Sol costs less than GPT-6 Astra. OpenAI has not confirmed GPT-6 Sol pricing.

What will the GPT-6 Sol API model ID be?

No model ID has been confirmed, even though gpt-6-sol is both the obvious guess and the string some responses have already returned. Check official documentation and the live provider catalog before integrating it, and keep the model ID in configuration rather than in code.

Can I use GPT-6 Sol on APIMaster now?

This page does not mark GPT-6 Sol as available. Check the APIMaster marketplace for live routes. Until a verified GPT-6 Sol route appears, developers can use the currently available gpt-6-astra or gpt-5.6-sol models.

Sources

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