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Key Takeaways
- The official page was observed on September 30; that is not a verified first-launch time. Start with an authorized, minimal request without tools.
- Standard rates per million tokens are $2 input, $0.10 cached reads, $2.50 cache writes and $10 output. Requests above 272K input tokens use higher rates for the entire request.
- Context is 1,050,000 tokens and maximum output 128,000. Text input/output and image input are supported; audio and video are not.
- Reasoning effort supports low, medium, high, xhigh and max, not none or minimal. Tool workflows use Responses.
- API access, ChatGPT, Codex and Copilot eligibility are separate; one subscription does not grant the others.
A model page is not universal project authorization
The official gpt-6.1-sol page describes complex coding, computer use and professional work, with lower-cost capability claims. Those are manufacturer descriptions, not benchmarks run here. September 30 is this article's observation date, not a verified launch time.
Check project, organization, region, billing and model access separately. With authorization, start with a short no-tool Responses request and low output limit, retaining HTTP body, request ID and token usage. Confirm key, base URL and permissions before changing model or network exits.
Compare the migration on tasks, not the model label
The September 22 GPT-6 Sol/Luna guide serves a different model-selection intent. GPT-6 Sol and 6.1 Sol list Standard input/output at $2/$10, while cached reads change from $0.20 to $0.10. Actual benefit depends on cache hits and mode; lower-cost or near-Astra claims guarantee no task result. These IDs and ChatGPT labels are not interchangeable.
Compare cross-file coding and debugging, tool workflows, and long-document work with fixed inputs, permissions and acceptance criteria. Measure correctness, rework and end-to-end cost. Include Astra when the task requires its capabilities, then evaluate actual outcomes.
Long context changes the whole-request bill
Standard rates per million tokens are $2 input, $0.10 cached reads, $2.50 cache writes and $10 output. Above 272K input tokens, input and cache rates double and output rises 1.5 times for the entire request, not just the excess portion. A large context limit does not promise the lowest rate throughout.
A hypothetical uncached 10K-input/2K-output Standard request with no tools or regional surcharge costs $0.02+$0.02=$0.04; this was not executed. Fast is twice Standard, while Batch/Flex are 50% where supported. Available regional processing adds 10%. Budget modes, cache hits, long requests and tool charges separately.
Reasoning and tools require parameter changes
Reasoning defaults to medium and supports low, medium, high, xhigh and max; none and minimal are unsupported. Begin comparisons at low rather than copying old settings. With reasoning enabled, remove temperature, top_p and top_logprobs; Chat Completions also disallows logprobs, and Responses should not request message.output_text.logprobs.
Tools use Responses; Chat Completions is for tool-free requests. Validate the minimal request before adding tool and structured-output workflows. Isolate writes, retain call IDs and tool results, and handle timeouts and replay without duplicate side effects. A parameter error alone does not prove the model is unreleased.
Context, knowledge and residency are different limits
The model accepts text and image input and outputs text, without audio/video support. Streaming, function calling and structured outputs are supported; fine-tuning is not. Its knowledge cutoff is April 30, 2026, so later facts require external evidence rather than simply a longer prompt.
US and EU data residency are supported, but EU residency cannot use Fast mode. Confirm actual project and mode, and compare short, medium and above-272K requests for outputs, latency, errors and cost. API access grants no automatic ChatGPT, Codex or Copilot entitlement.
Keep a validated rollback configuration
Save baseline configuration and evaluations, validate the minimal request, correct reasoning/tool parameters, calculate actual tiers, then increase traffic gradually. Compare completion, duplicate writes, latency and cost. Stop persistent authorization/400 errors, duplicate writes, important evaluation regressions or budget overruns, and roll back to a validated configuration with redacted request evidence.
PuppyIP network guidance applies only to evidenced DNS, TLS, timeout, disconnect or 407 issues. An exit IP cannot authorize a model or subscription, repair incompatible parameters or reduce official API rates.
Sources
Frequently Asked Questions
What is the API ID, and does the page guarantee access?
The ID is gpt-6.1-sol. Confirm access for the actual project, organization and region; the public page does not authorize every account.
What are Standard token rates?
Per million tokens: $2 input, $0.10 cached reads, $2.50 cache writes and $10 output. Long-context, mode and regional conditions may change the total.
Why does reasoning effort none fail?
It is unsupported. Use low, medium, high, xhigh or max and remove parameters incompatible with reasoning.
Can Chat Completions run the same tool workflow?
The documented tool path is Responses. Chat Completions is tool-free here; do not assume endpoint parity.
Does the million-token limit keep input at $2?
No. Above 272K input tokens, higher rates apply to the entire request, including increased output pricing.
Does API access also grant Codex or ChatGPT access?
No. These products and Copilot have separate plans, permissions and rollout conditions.