OpenAI: GPT-6 Astra
GPT-6 Astra is OpenAI's flagship model for demanding end-to-end work. It is suited for advanced analysis, software engineering, deep research, scientific work, and document creation, with particular strengths in long-horizon...
Anyone in the Project can @-mention OpenAI: GPT-6 Astra with the team's shared context - pooled credits, one chat, one memory.
Starter is free forever - 1 Project, 100 credits/month, 1 MCP. No card.
Verdict
Best for
- Full codebase analysis without chunking
- Multi-document legal contract review
- Long-form research synthesis from PDFs
- Meeting transcript analysis across sessions
- Large-scale data extraction from files
Strengths
The 1.05M token window is the headline feature — you can load 30+ research papers, a year of Slack logs, or a 200k-line codebase and ask cross-cutting questions without retrieval pipelines. File and image modalities mean you can drop in PDFs, spreadsheets, and screenshots directly. Early adopter reports suggest strong instruction-following on complex multi-step tasks that span the entire context, though public benchmarks are still pending.
Trade-offs
At $50/Mtok output, this is one of the priciest frontier models available — a 10k-token response costs $0.50, versus $0.15 on Claude Sonnet 4. You pay for the context window whether you use it or not, so short-context tasks are better served by cheaper models. Without published benchmark scores yet, it's unclear how reasoning quality compares to GPT-4.5 or Claude Opus on standard evals, so early projects should validate performance on representative tasks before committing.
Specifications
- Provider
- openai
- Category
- llm
- Context length
- 1,050,000 tokens
- Max output
- 128,000 tokens
- Modalities
- file, image, text
- License
- proprietary
- Released
- 2026-09-04
Pricing
- Input
- $10.00/Mtok
- Output
- $50.00/Mtok
- Model ID
openai/gpt-6-astra
Per-token prices show what the model costs upstream. On Switchy your team draws from one shared org credit pool - one plan, one balance for everyone.
Team cost calculator
5 seats · 80 msgs/day
Switchy meters this against your org's shared credit pool - one plan, one balance for everyone.
Providers
| Provider | Context | Input | Output | P50 latency | Throughput | 30d uptime |
|---|---|---|---|---|---|---|
| openai | 1050k | $10.00/Mtok | $50.00/Mtok | — | — | — |
Performance
Benchmarks
Works well with
Top MCPs
Compatibility data comes from first-party telemetry; once we have enough co-usage signal, top MCPs for this model will appear here.
How Switchy teams use it
Starter prompts
Codebase Architecture Review
I've uploaded our full codebase (approximately 180k tokens). Review the architecture, identify tight coupling between modules, and propose three specific refactorings that would improve testability. Reference actual file paths and function names in your recommendations.
Multi-Document Contract Gap Analysis
I've attached five vendor contracts (combined ~400k tokens). Identify any conflicting termination clauses, flag missing indemnification language, and create a summary table showing liability caps across all agreements.
Research Literature Synthesis
I've uploaded 25 research papers on transformer attention mechanisms (total ~600k tokens). Synthesize the main approaches to reducing attention complexity, note where papers contradict each other, and suggest three under-explored research directions based on gaps you identify.
Meeting Transcript Trend Analysis
These are transcripts from our last 40 weekly standups (combined ~300k tokens). Identify recurring blockers that appear in at least five meetings, track how priorities shifted over time, and list action items that were mentioned but never resolved.
Large Dataset Schema Extraction
I've uploaded six related CSV files (total ~500k tokens of raw data). Infer the implicit schema, identify foreign key relationships between files, flag any data quality issues like missing values or type mismatches, and propose a normalized database design.
Example outputs
Illustrative - representative of the model's voice and quality, not literal recordings.
Review this 40-page technical spec for our new API gateway. Identify architectural risks, suggest three concrete improvements, and flag any sections that contradict our existing auth patterns.
In this illustrative example, the model would parse the entire specification in one pass (well within its 1M+ token window), then produce a structured analysis: first, a risk matrix highlighting the lack of rate-limiting strategy on pages 12-14 and the circular dependency between the auth service and logging pipeline described on page 28. Next, three improvements: consolidating the redundant endpoint definitions in sections 4 and 9, introducing a circuit-breaker pattern for the external payment provider, and standardising error codes across all routes. Finally, it would flag the OAuth2 flow on page 35 as incompatible with the refresh-token rotation policy documented elsewhere, citing specific line numbers from both sources.
This example showcases the model's massive context window — ingesting a full technical document without chunking or summarisation loss. The multi-step reasoning (risk identification, improvement generation, cross-reference checking) demonstrates the model's ability to hold complex instructions while processing large inputs. Trade-off: at $50/Mtok output, a verbose response here could cost $2-3, making it expensive for iterative review workflows.
I'm attaching a screenshot of a broken dashboard layout in our analytics tool. Explain what's causing the CSS overflow issue and write the fix.
In this illustrative example, the model would analyse the uploaded screenshot, identify that the `.metrics-panel` container has `overflow: hidden` but its child `.chart-wrapper` uses `position: absolute` with no bounding constraints, causing the chart to render outside the visible area. It would then provide a corrected CSS snippet: set `.metrics-panel` to `position: relative` and constrain `.chart-wrapper` with `max-width: 100%` and `right: 0`. The explanation would reference visible UI elements in the screenshot (the clipped bar chart, the scrollbar position) to confirm the diagnosis.
This example highlights native image understanding without requiring separate vision API calls. The model can debug visual layout issues directly from screenshots, useful for front-end troubleshooting. Trade-off: while the model can describe what it sees, it cannot interact with live DOM or browser dev tools, so complex dynamic layout bugs may need follow-up questions.
Generate a Python script that reads this 80MB CSV of transaction logs, detects anomalies using z-score, and outputs a summary report with visualisations. Assume the CSV is already uploaded.
In this illustrative example, the model would produce a complete script: imports for pandas, numpy, and matplotlib; a function to load the CSV in chunks (to handle the 80MB size efficiently); z-score calculation across transaction amounts with a configurable threshold; anomaly flagging logic that marks outliers and groups them by merchant ID; and a matplotlib block generating a histogram of normal vs. anomalous transactions plus a time-series plot showing anomaly clusters. The script would include error handling for malformed rows and a final print statement summarising total anomalies found and their aggregate value.
This example demonstrates end-to-end code generation for a realistic data task, including file handling, statistical analysis, and visualisation — all from a single prompt. The model's large context window means it can reference the uploaded file structure if provided. Trade-off: the script is illustrative; real-world CSV quirks (encoding issues, missing columns) may require iteration, and the model cannot execute the code to verify correctness.
Use-case deep-dives
When 1M+ token context justifies the premium on legal work
A 12-person legal ops team needs to compare redlines across 40+ vendor agreements simultaneously—each contract averaging 15-20 pages with exhibits. GPT-6 Astra's 1.05M token window lets you load the entire negotiation history in one context, then ask "which clauses conflict with our standard indemnity language" without chunking or retrieval lag. At $10 input / $50 output per Mtok, a typical 800k-token analysis run costs $8 input + $2 output if you generate a 40k summary. That's expensive compared to Claude 3.5 Sonnet ($3 input / $15 output), but Sonnet's 200k window forces you into a RAG pipeline that adds engineering overhead and risks missing cross-document dependencies. If you're running fewer than 20 of these analyses per month, the engineering cost of building retrieval outweighs Astra's price premium. For teams doing this daily, Astra is the straightforward call.
Why Astra's multimodal support doesn't justify the output cost here
A 5-person e-commerce moderation team processes 2,000 product images daily, flagging policy violations and writing rejection reasons. Astra handles image + text, but at $50/Mtok output, generating a 150-token explanation per image costs $0.0075—$15/day or $450/month at volume. GPT-4o runs the same task at $15/Mtok output ($0.00225 per image, $4.50/day, $135/month) with comparable accuracy on straightforward classification. Astra's massive context window doesn't help here because each image is an independent decision. The 3.3x cost difference only makes sense if you're also using the same model for long-context work elsewhere in your stack and want to consolidate vendors. Otherwise, route this task to GPT-4o or Gemini 1.5 Flash and save the budget for scenarios where the 1M+ window actually matters.
When Astra's context window collapses a multi-step research workflow
A 3-person investment research team analyzes 60+ earnings transcripts each quarter, cross-referencing management commentary against prior quarters and 10-K filings. Traditional approach: chunk documents, embed them, retrieve relevant passages per query, then synthesize. Astra's 1M+ token context lets you load 12 quarters of transcripts (roughly 600k tokens) plus the latest 10-K in a single prompt, then ask "how has the CFO's language on margin pressure evolved since Q2 2023" without retrieval overhead. At $10 input per Mtok, loading 800k tokens costs $8 per analysis session. If you're running 15-20 of these deep-dives per quarter, that's $120-160 in input costs—cheaper than paying an engineer to build and maintain a RAG pipeline for three people. The output cost ($50/Mtok) stays reasonable because you're generating summaries, not long-form content. For small research teams doing infrequent but deep document work, Astra eliminates the RAG tax.
Frequently asked
Is GPT-6 Astra good for long document analysis?
Yes. The 1.05M token context window handles entire codebases, legal contracts, or research papers in a single prompt. You can feed it 800-page PDFs without chunking. For tasks needing deep cross-reference across hundreds of pages, this is the model to use.
Is GPT-6 Astra cheaper than Claude Opus 4?
No. At $10 input and $50 output per million tokens, Astra costs roughly 2-3x more than Opus 4 for most workloads. You're paying for the massive context window and multimodal file handling. If you don't need 1M+ tokens, use Claude or GPT-5 instead.
Can GPT-6 Astra process multiple images in one request?
Yes. It accepts image, text, and file inputs simultaneously. You can upload screenshots, diagrams, and documents together, then ask cross-modal questions. Useful for design reviews, technical documentation, or analyzing visual data alongside written reports.
How does GPT-6 Astra compare to GPT-5 Turbo?
Astra has 10x the context window (1.05M vs 128K) and adds native file handling. GPT-5 Turbo is faster and cheaper for short conversations. Choose Astra when you need to process book-length inputs or complex multi-file workflows; stick with Turbo for chat and quick tasks.
Should I use GPT-6 Astra for real-time chat applications?
Probably not. The $50/Mtok output pricing makes conversational use expensive, and latency likely suffers with the huge context window. For chat, use GPT-5 Turbo or Claude Sonnet. Reserve Astra for batch processing, research analysis, or one-off deep dives into large datasets.
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