High-volume, cost-sensitive work
Choose Grok 4.3
Grok 4.3 costs 19% less on a typical mix of three input tokens for every output token ($1.56 against $1.93 per million tokens).
Grok 4.3 vs o3-mini: price, context and capabilities
Choose Grok 4.3 for high-volume, cost-sensitive work, writing and code generation, reused prompts and documents (RAG, agents), very long inputs, agentic coding, tool use and support agents and the latest release; on the other points the two are level or the data is missing.
In short
- Grok 4.3 is 19% cheaper than o3-mini at the headline price ($1.56 / 1M tokens vs $1.93 / 1M tokens).
- Grok 4.3 reads more per request: 1M tokens against 200k.
- Grok 4.3 is the newer model (Apr 30, 2026, against Jan 31, 2025).
Which should you choose?
Each answer below comes straight from the published prices, specifications and independent benchmark results.
Writing and code generation
Choose Grok 4.3
Grok 4.3 charges $2.50 per million output tokens, against $4.40 for o3-mini. Output dominates the bill when answers are long.
Reused prompts and documents (RAG, agents)
Choose Grok 4.3
Grok 4.3 charges $0.20 per million cached input tokens, against $0.55 for o3-mini.
Very long inputs
Choose Grok 4.3
Grok 4.3 reads up to 1M tokens per request, against 200k for o3-mini.
Agentic coding
Choose Grok 4.3
Grok 4.3 scores 37.9% on Terminal-Bench Hard, against 6.8% for o3-mini.
Tool use and support agents
Choose Grok 4.3
Grok 4.3 scores 97.7% on τ²-Bench (agentic tool use), against 28.7% for o3-mini.
Latest release
Choose Grok 4.3
Grok 4.3 is the newer release (Apr 30, 2026, against Jan 31, 2025 for o3-mini).
Monthly cost at three volumes
| Volume | Grok 4.3 | o3-mini | Difference |
|---|---|---|---|
| Prototype: 1M input, 250K output tokens | $1.88 | $2.20 | Grok 4.3, $0.33 less |
| Production: 20M input, 5M output tokens | $37.50 | $44.00 | Grok 4.3, $6.50 less |
| Scale: 500M input, 100M output tokens | $875.00 | $990.00 | Grok 4.3, $115.00 less |
Standard rates, without caching or batch discounts. Volumes are per month.
Specifications side by side
| Grok 4.3 | o3-mini | |
|---|---|---|
| Provider | xAI | OpenAI |
| Category | Language models | Language models |
| Status | Generally available | Deprecated |
| Headline price | $1.56 / 1M tokens | $1.93 / 1M tokens |
| Input | $1.25 / 1M tokens | $1.10 / 1M tokens |
| Output | $2.50 / 1M tokens | $4.40 / 1M tokens |
| Cached input | $0.20 / 1M tokens | $0.55 / 1M tokens |
| Context window | 1M | 200k |
| Max output | No data | 100k |
| Released | Apr 30, 2026 | Jan 31, 2025 |
| Knowledge cutoff | No data | October 2023 |
| Licence | Proprietary | Proprietary |
| Capabilities | Vision, Reasoning, Tool calling, Structured output, Prompt caching, Batch API | Vision, Reasoning, Tool calling, Structured output, Prompt caching, Batch API |
| API model id | grok-4.3 | o3-mini |
Benchmarks side by side
Leader in bold.
| Benchmark | Grok 4.3 | o3-mini |
|---|---|---|
| Terminal-Bench Hard | 37.9% | 6.8% |
| GPQA Diamond | 90.1% | 74.8% |
| Humanity's Last Exam | 37.2% | 7.9% |
| τ²-Bench (agentic tool use) | 97.7% | 28.7% |
| Intelligence Index | 24.9 | No data |
| SciCode | 48.3% | No data |
| IFBench (instruction following) | 81.3% | No data |
| MMMU-Pro (visual reasoning) | 78.1% | No data |
| Long-context reasoning (AA-LCR) | 73% | No data |
Independent evaluations by Artificial Analysis, run the same way for every model, at the reasoning setting shown. Percentages unless marked as an index.
Frequently asked questions
Should I choose Grok 4.3 or o3-mini?
Choose Grok 4.3 for high-volume, cost-sensitive work, writing and code generation, reused prompts and documents (RAG, agents), very long inputs, agentic coding, tool use and support agents and the latest release; on the other points the two are level or the data is missing.
Which is cheaper, Grok 4.3 or o3-mini?
Grok 4.3 is 19% cheaper than o3-mini at the headline price ($1.56 / 1M tokens vs $1.93 / 1M tokens).
Which has the larger context window, Grok 4.3 or o3-mini?
Grok 4.3 reads more per request: 1M tokens against 200k.
What is the difference between Grok 4.3 and o3-mini?
Grok 4.3 is made by xAI and o3-mini by OpenAI. Grok 4.3 is 19% cheaper than o3-mini at the headline price ($1.56 / 1M tokens vs $1.93 / 1M tokens). Grok 4.3 reads more per request: 1M tokens against 200k. Grok 4.3 is the newer model (Apr 30, 2026, against Jan 31, 2025).
Which is better for coding, Grok 4.3 or o3-mini?
Grok 4.3 scores 37.9% on Terminal-Bench Hard, against 6.8% for o3-mini.
How much do Grok 4.3 and o3-mini cost per month?
At 20 million input and 5 million output tokens a month, Grok 4.3 costs $37.50 and o3-mini costs $44.00, at standard rates.
Which is newer, Grok 4.3 or o3-mini?
Grok 4.3 was released on Apr 30, 2026 and o3-mini on Jan 31, 2025.