What is Codex 6.1 Sol?

Per the web directory description, it refers to OpenAI's GPT-6.1 Sol model as used in the Codex coding environment — 'near-Astra intelligence at low cost' is the description's positioning. It is a modifier query about the pairing, not a separate model.

Is Codex 6.1 Sol a different model from GPT-6.1 Sol?

No evidence suggests a separate model. The phrase joins OpenAI's Codex coding environment name with the Sol model name; the directory description describes Sol's characteristics as delivered in that context. The underlying model card lives on our GPT Sol 6.1 page.

How good is GPT-6.1 Sol for coding?

Directory positioning says near-Astra intelligence at low cost — vendor-adjacent claims we cannot verify. No independent reproducible coding benchmark we can vouch for exists yet; trial on your own repository is the evidence that transfers.

How much does it cost?

'Low cost' is positioning language, not a price. We do not republish unverified numbers; check OpenAI's official pricing page, and remember coding-agent sessions multiply token consumption versus chat.

Codex 6.1 Sol

"Codex 6.1 sol" is a modifier query: it takes the season's Sol model and asks about it inside the coding context. The directory description is explicit about the pairing — "OpenAI's GPT-6.1 Sol model, delivering near-Astra intelligence at low cost in the Codex programming environment" observed. Our tracker logged the phrase at roughly 0.23× the GPTs baseline and rising, with eight dedicated pages in the field observed. This page explains what the modifier changes, what it doesn't, and how to evaluate the pairing without touching the hype. Labels: vendor claim / observed / analysis.

What the "Codex" modifier actually does to the query

Strip the modifier and you have GPT-6.1 Sol — a model card question. Add "Codex" and the question becomes situational analysis:

Availability intent: "can I select Sol inside the coding environment?" — a documentation question with a checkable answer.
Fitness intent: "is the low-cost Sol model good enough for agentic coding?" — the economically interesting one, because "low cost" positioning plus "near-Astra intelligence" positioning is precisely the value proposition coding agents want analysis.
Bundle intent: confusion with Codex 6.1, the separately-described coding model from the same DevDay window observed — the two phrases are adjacent, not identical.

Why the pairing makes economic sense (if the positioning holds)

Coding agents are token furnaces: every file read and tool result re-enters the context, so per-token cost compounds across a session analysis. A model positioned as "near-Astra intelligence at low cost" is aiming exactly at that math — sacrifice a little ceiling, save a lot of budget, across thousands of calls analysis. Whether the trade holds for your sessions is testable:

Pick three real tasks — a bugfix, a refactor, a greenfield script — and run them through the coding environment with Sol selected analysis.
Count outcomes, not vibes: retries, failed edits, cleanup time. A cheap model that derails twice costs more than a pricey one that lands once analysis.
Price the month: current rates from OpenAI's official pages, modeled in our API cost calculator analysis.

Model card (pairing view)

Field	What we can say
Phrase meaning	GPT-6.1 Sol as delivered in the Codex coding environment, per directory description observed
Positioning	Near-Astra intelligence, low cost — directory language vendor claim
Distinct from	Codex 6.1, described as its own coding model from the same launch window observed
Sibling context	Sol announced alongside Luna; Astra the earlier-generation comparator observed
Independent benchmarks	None we can vouch for yet — no verified coding-agent evaluations exist for this pairing analysis

Codex 6.1 — the coding-model card from the same DevDay window
GPT Sol 6.1 — the underlying model, in depth
OpenAI 6.1 Sol — the brand-qualified variant of the same query
GPT-6.1 Sol vs Astra — the successor comparison the positioning references

Codex 6.1 Sol FAQ

Is "Codex 6.1 Sol" one product or two?

Two names, one pairing: the directory description describes the Sol model within the Codex coding environment observed. No source we captured treats it as a separate model analysis.

Is the "near-Astra" claim verified?

No — it is directory positioning language vendor claim. The community thread claiming "out at Astra level" is anecdote observed. Wait for reproducible benchmarks, or generate your own on real tasks analysis.

Cheap model for serious coding — good idea?

For short, high-volume tasks, historically yes. For long agentic runs with expensive failures, test whether the ceiling gap bites before migrating analysis.

Where do I check availability and pricing?

OpenAI's official documentation and pricing pages. Once you have rates, our calculator models per-session cost analysis.

This page is descriptive and independent, last reviewed October 8, 2026. Not affiliated with OpenAI. "OpenAI", "Codex" and "GPT" are trademarks of their respective owners; third-party claims are reported with attribution and not independently verified.