Both models report the same input price at $1.25 per 1M tokens.
API cost decision in 10 seconds
GPT-5.1-Codex-Max vs Cogito v2.1 671B
Pick Cogito v2.1 671B for lower cost; pick GPT-5.1-Codex-Max only if the larger context window matters more.
Pricing data updated:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Cogito v2.1 671B for lower cost; pick GPT-5.1-Codex-Max only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Cogito v2.1 671B is estimated at $1.88 vs $6.25 for GPT-5.1-Codex-Max, saving $4.38 (70% lower).
Cost-first pickCogito v2.1 671B
Context-first pickGPT-5.1-Codex-Max
Sample savings$4.3870%
10x traffic gap$43.75
GPT-5.1-Codex-Max has more context, but Cogito v2.1 671B saves $4.38 on the standard workload. At 10x that traffic, the same price gap is about $43.75. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Cogito v2.1 671B stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | GPT-5.1-Codex-Max | Cogito v2.1 671B |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Cogito v2.1 671B | $11.25 | $6.88 |
| Balanced workload | 1M input + 1M output | Cogito v2.1 671B | $11.25 | $2.5 |
| Output-heavy chatbot | 1M input + 5M output | Cogito v2.1 671B | $51.25 | $7.5 |
Cogito v2.1 671B is $8.75 cheaper per 1M output tokens (87.5% lower; 8x difference).
GPT-5.1-Codex-Max has 272K more context (3.12x larger).
Cogito v2.1 671B is $4.38 cheaper on the standard workload (70% lower).
Estimate your workload cost
Your Workload Cost
This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.
Quick Decision
both models tie on input price; Cogito v2.1 671B has the lower output price; GPT-5.1-Codex-Max offers the larger context window. For the 1M input plus 500K output sample, Cogito v2.1 671B is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $6.25 for GPT-5.1-Codex-Max and $1.88 for Cogito v2.1 671B.
Choose GPT-5.1-Codex-Max when you care most about larger context window.
Choose Cogito v2.1 671B when you care most about lower output-token price.
- On the standard 1M input plus 500K output workload, Cogito v2.1 671B is estimated at $1.88 vs $6.25 for GPT-5.1-Codex-Max, saving $4.38 (70% lower).
- Cogito v2.1 671B is $4.38 cheaper on the standard workload (70% lower).
- Both models report the same input price at $1.25 per 1M tokens.
- Cogito v2.1 671B is $8.75 cheaper per 1M output tokens (87.5% lower; 8x difference).
- GPT-5.1-Codex-Max has 272K more context (3.12x larger).
| Feature | GPT-5.1-Codex-Max (OpenAI) | Cogito v2.1 671B (Deep Cogito) |
|---|---|---|
| Input Price prompt tokens per 1M | $1.25 | $1.25 |
| Completion Price per 1M tokens | $10 | $1.25 |
| Sample Workload Cost 1M input + 500K output | $6.25 | $1.88 |
| Context Window | 400K | 128K |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Cogito v2.1 671B | On the standard 1M input plus 500K output workload, Cogito v2.1 671B is estimated at $1.88 vs $6.25 for GPT-5.1-Codex-Max, saving $4.38 (70% lower). |
| High-volume input processing | Tie | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Cogito v2.1 671B | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | GPT-5.1-Codex-Max | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- gpt-oss-120b (free) can replace GPT-5.1-Codex-Max when lower sample workload cost matters most: $0.
- gpt-oss-20b (free) can replace GPT-5.1-Codex-Max when lower sample workload cost matters most: $0.
- gpt-oss-20b can replace GPT-5.1-Codex-Max when lower sample workload cost matters most: $0.1.
- gpt-oss-120b can replace GPT-5.1-Codex-Max when lower sample workload cost matters most: $0.13.
- Llama 4 Scout offers 10M context with $0.23 sample workload cost.
- Grok 4.20 Multi-Agent offers 2M context with $5 sample workload cost.
- Grok 4.20 offers 2M context with $2.5 sample workload cost.
- Owl Alpha offers 1.05M context with $0 sample workload cost.
- No popular competitor is currently available.
Cheaper alternatives
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