Model comparison - Similar price, same tier
Grok Build 0.1 vs Mistral Medium 3.5
Grok Build 0.1 is from xAI and Mistral Medium 3.5 is from Mistral AI. On list price, Mistral Medium 3.5 charges 1.5x Grok Build 0.1's input price ($1.50 vs $1 per 1M tokens), and Mistral Medium 3.5 charges 3.8x Grok Build 0.1's output price ($7.50 vs $2 per 1M tokens). Grok Build 0.1 and Mistral Medium 3.5 both have a 256,000-token context window. Grok Build 0.1 was released on May 19, 2026 and Mistral Medium 3.5 on April 27, 2026. Mistral Medium 3.5 publishes open weights (Modified MIT (https://huggingface.co/mistralai/Mistral-Medium-3.5-128B/blob/main/LICENSE)); Grok Build 0.1 is closed-weights.
Last verified from each provider's pricing page. All sources
Side-by-side specs
| Spec | Grok Build 0.1 | Mistral Medium 3.5 |
|---|---|---|
| Provider | xAI | Mistral AI |
| Input / 1M tokens | $1 | $1.50 |
| Output / 1M tokens | $2 | $7.50 |
| Cache read / 1M | $0.20 | $0.15 |
| Batch input / 1M | - | $0.75 |
| Batch output / 1M | - | $3.75 |
| Long-context rates above | 200,000 tokens | - |
| Context window | 256,000 | 256,000 |
| Release date | ||
| Weights | Closed | Open |
| License | - | Modified MIT (https://huggingface.co/mistralai/Mistral-Medium-3.5-128B/blob/main/LICENSE) |
| API model id | grok-build-0.1 | mistral-medium-3-5 |
| AI Gateway id | spacexai/grok-build-0.1 | mistral/mistral-medium-3.5 |
| Last verified |
Prices in USD per 1M tokens at each provider's standard first-party rate. A dash means the provider does not bill that item separately or no primary page states it.
What each costs in practice
The same three workloads every model page uses, worked from each model's standard list rates. Swap in your own token counts with the math on each model's page.
| Workload | Grok Build 0.1 | Mistral Medium 3.5 |
|---|---|---|
| One agent session1M input tokens and 100K output tokens, no caching. | $1.20 | $2.25 |
| A chat app10,000 requests a day at 2K input and 500 output tokens each. | $30.00$900.00 per 30-day month | $67.50$2,025.00 per 30-day month |
| The same session at a 90% cache hit90% of the input is read from the prompt cache. The one-time cache write premium is not included. | $0.48 | $1.04 |
Show the math
Grok Build 0.1
- One agent sessionInput: 1M x $1 = $1.00Output: 0.1M x $2 = $0.20
- A chat appInput: 20M x $1 = $20.00Output: 5M x $2 = $10.00
- The same session at a 90% cache hitCached input: 0.9M x $0.20 = $0.18Uncached input: 0.1M x $1 = $0.10Output: 0.1M x $2 = $0.20
Mistral Medium 3.5
- One agent sessionInput: 1M x $1.50 = $1.50Output: 0.1M x $7.50 = $0.75
- A chat appInput: 20M x $1.50 = $30.00Output: 5M x $7.50 = $37.50
- The same session at a 90% cache hitCached input: 0.9M x $0.15 = $0.135Uncached input: 0.1M x $1.50 = $0.15Output: 0.1M x $7.50 = $0.75
Benchmarks under the same setting
No board in the benchmark directory lists both Grok Build 0.1 and Mistral Medium 3.5 under the same setting, so there is no like-for-like score to show here.
Set them up in your tools
Step-by-step guides whose official docs list Grok Build 0.1 or Mistral Medium 3.5 by model id.
- Use Grok in ClineLists Grok Build 0.1
- Use Grok in Codex CLILists Grok Build 0.1
- Use Grok in ContinueLists Grok Build 0.1
- Use Grok in Kilo CodeLists Grok Build 0.1
- Use Grok in OpenCodeLists Grok Build 0.1
- Use Grok in Roo CodeLists Grok Build 0.1
- Use Grok in ZedLists Grok Build 0.1
- Use Mistral in AiderLists Mistral Medium 3.5
- Use Mistral in ClineLists Mistral Medium 3.5
- Use Mistral in ContinueLists Mistral Medium 3.5
- Use Mistral in GitHub CopilotLists Mistral Medium 3.5
- Use Mistral in GooseLists Mistral Medium 3.5
- Use Mistral in Kilo CodeLists Mistral Medium 3.5
- Use Mistral in OpenCodeLists Mistral Medium 3.5
- Use Mistral in Roo CodeLists Mistral Medium 3.5
- Use Mistral in ZedLists Mistral Medium 3.5
Model pages
FAQ
How do Grok Build 0.1 and Mistral Medium 3.5 compare on price?
On list price, Mistral Medium 3.5 charges 1.5x Grok Build 0.1's input price ($1.50 vs $1 per 1M tokens), and Mistral Medium 3.5 charges 3.8x Grok Build 0.1's output price ($7.50 vs $2 per 1M tokens). For one agent session of 1M input and 100K output tokens with no caching, that is $1.20 on Grok Build 0.1 and $2.25 on Mistral Medium 3.5. Prices are each provider's first-party list rates, verified October 17, 2026 and October 17, 2026.
What are the context windows of Grok Build 0.1 and Mistral Medium 3.5?
Grok Build 0.1 and Mistral Medium 3.5 both have a 256,000-token context window.
Are Grok Build 0.1 and Mistral Medium 3.5 open weights?
Grok Build 0.1 is closed-weights and is called through xAI's API as grok-build-0.1. Mistral Medium 3.5's weights are published at huggingface.co under the Modified MIT (https://huggingface.co/mistralai/Mistral-Medium-3.5-128B/blob/main/LICENSE).
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Sources
Grok Build 0.1 verified from docs.x.ai; Mistral Medium 3.5 verified from docs.mistral.ai. This page is as current as the older of the two: .
- https://docs.x.ai/developers/pricing
- https://docs.mistral.ai/inference/pricing
- https://docs.x.ai/developers/models/grok-build-0.1
- https://docs.x.ai/developers/release-notes
- https://x.ai/news
- https://docs.mistral.ai/models/mistral-medium-3-5-26-04
- https://docs.mistral.ai/resources/changelogs
- https://huggingface.co/mistralai/Mistral-Medium-3.5-128B
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