API cost decision in 10 seconds

GPT-5 vs Mistral Large 3 2512

Pick Mistral Large 3 2512 for lower cost; pick GPT-5 only if the larger context window matters more.

Page updated: 2026-05-26T15:08:08Z Data confirmed: 2026-05-26T18:08:02Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Mistral Large 3 2512 for lower cost; pick GPT-5 only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Mistral Large 3 2512 is estimated at $1.25 vs $6.25 for GPT-5, saving $5 (80% lower).

Cost-first pickMistral Large 3 2512

Context-first pickGPT-5

Sample savings$580%

10x traffic gap$50

GPT-5 has more context, but Mistral Large 3 2512 saves $5 on the standard workload. At 10x that traffic, the same price gap is about $50. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Mistral Large 3 2512 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	GPT-5	Mistral Large 3 2512
Input-heavy / RAG	5M input + 500K output	Mistral Large 3 2512	$11.25	$3.25
Balanced workload	1M input + 1M output	Mistral Large 3 2512	$11.25	$2
Output-heavy chatbot	1M input + 5M output	Mistral Large 3 2512	$51.25	$8

Cheaper input Mistral Large 3 2512 $1.25 vs $0.5 / 1M

Mistral Large 3 2512 is $0.75 cheaper per 1M input tokens (60% lower; 2.5x difference).

Cheaper output Mistral Large 3 2512 $10 vs $1.5 / 1M

Mistral Large 3 2512 is $8.5 cheaper per 1M output tokens (85% lower; 6.67x difference).

Larger context GPT-5 400K vs 262.14K

GPT-5 has 137.86K more context (1.53x larger).

Sample workload Mistral Large 3 2512 $6.25 vs $1.25

Mistral Large 3 2512 is $5 cheaper on the standard workload (80% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

GPT-5 Calculating… Estimated API cost

Mistral Large 3 2512 Calculating… Estimated API cost

Cheaper for this workload Calculating… Difference: calculating…

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

Verdict

Mistral Large 3 2512 has the lower input price; Mistral Large 3 2512 has the lower output price; GPT-5 offers the larger context window. For the 1M input plus 500K output sample, Mistral Large 3 2512 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 and $1.25 for Mistral Large 3 2512.

Best Fit

Choose GPT-5 when you care most about larger context window.

Choose Mistral Large 3 2512 when you care most about lower input-token price, and lower output-token price.

Decision Notes

On the standard 1M input plus 500K output workload, Mistral Large 3 2512 is estimated at $1.25 vs $6.25 for GPT-5, saving $5 (80% lower).
Mistral Large 3 2512 is $5 cheaper on the standard workload (80% lower).
Mistral Large 3 2512 is $0.75 cheaper per 1M input tokens (60% lower; 2.5x difference).
Mistral Large 3 2512 is $8.5 cheaper per 1M output tokens (85% lower; 6.67x difference).
GPT-5 has 137.86K more context (1.53x larger).

Head-to-Head Specs

Feature	GPT-5 (OpenAI)	Mistral Large 3 2512 (Mistral)
Input Price prompt tokens per 1M	$1.25	$0.5
Completion Price per 1M tokens	$10	$1.5
Sample Workload Cost 1M input + 500K output	$6.25	$1.25
Context Window	400K	262.14K
Release Date	2025-08-07	2025-12-01
Popularity	#57	#114

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	Mistral Large 3 2512	On the standard 1M input plus 500K output workload, Mistral Large 3 2512 is estimated at $1.25 vs $6.25 for GPT-5, saving $5 (80% lower).
High-volume input processing	Mistral Large 3 2512	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Mistral Large 3 2512	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	GPT-5	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

gpt-oss-120b (free) can replace GPT-5 when lower sample workload cost matters most: $0.
gpt-oss-20b (free) can replace GPT-5 when lower sample workload cost matters most: $0.
gpt-oss-20b can replace GPT-5 when lower sample workload cost matters most: $0.1.
gpt-oss-120b can replace GPT-5 when lower sample workload cost matters most: $0.13.

Larger context near this budget

Llama 4 Scout offers 10M context with $0.23 sample workload cost.
Grok 4.20 offers 2M context with $2.5 sample workload cost.
Grok 4.20 Multi-Agent offers 2M context with $5 sample workload cost.
Owl Alpha offers 1.05M context with $0 sample workload cost.

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OpenAI catalog

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Mistral catalog

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GPT-5

GPT-5 is OpenAI’s most advanced model, offering major improvements in reasoning, code quality, and user experience. It is optimized for complex tasks that require step-by-step reasoning, instruction following, and accuracy...

Mistral Large 3 2512

Mistral Large 3 2512 is Mistral’s most capable model to date, featuring a sparse mixture-of-experts architecture with 41B active parameters (675B total), and released under the Apache 2.0 license.