GPT-5.6 Terra vs Grok 4.7: pricing and benchmarks
Both charge $2.00 per 1M input tokens. Grok 4.7 is 50% cheaper on output tokens ($6.00 vs $12.00 per 1M). On our document Q&A workload (50,000 questions a month), Grok 4.7 costs $980.00 a month versus $1,160 for GPT-5.6 Terra, 16% less. GPT-5.6 Terra scores 159.4 on the Epoch Capabilities Index vs 154.4 for Grok 4.7.
Which should you choose?
GPT-5.6 Terra scores 159.4 on the Epoch Capabilities Index vs 154.4 for Grok 4.7.
GPT-5.6 Terra scores 86.0% on FrontierMath (Tiers 1–3) vs 53.0% for Grok 4.7.
Grok 4.7 costs $3.00 per 1M tokens (3:1 input-to-output mix) vs $4.50 for GPT-5.6 Terra, 33% less.
A trade-off: GPT-5.6 Terra is 5.1 ECI points more capable but costs 1.5x as much as Grok 4.7.
Pricing and specs
| GPT-5.6 Terra | Grok 4.7 | |
|---|---|---|
| Provider | OpenAI | xAI |
| API model ID | gpt-5.6-terra | grok-4.7 |
| Input / 1M tokens | $2.00 | $2.00 |
| Cached input / 1M tokens | $0.20 | $0.50 |
| Output / 1M tokens | $12.00 | $6.00 |
| Long-context rates | $4.00 in / $18.00 out on long-context requests | $4.00 in / $12.00 out above 200K prompt tokens |
| Context window | 1.05M tokens | 500K tokens |
| Max output | 128K tokens | — |
| Batch discount | 50% off | — |
Benchmarks
| GPT-5.6 Terra | Grok 4.7 | |
|---|---|---|
| Epoch Capabilities Index | 159.4 | 154.4 |
| GPQA Diamond· Science reasoning | 93.3% | 92.7% |
| FrontierMath (Tiers 1–3)· Advanced math | 86.0% | 53.0% |
| SimpleQA Verified· Factual accuracy | 43.2% | 56.0% |
| ARC-AGI-2· Abstract reasoning | 83.9% | 61.4% |
| DeepSWE· Coding | 69.6% | — |
| APEX-Agents· Agentic work | 58.2% | 54.6% |
Source: Epoch AI, best recorded result per model (CC BY 4.0). A dash means no published score. See all benchmarks
Monthly cost for real workloads
| Workload | GPT-5.6 Terra | Grok 4.7 | Difference |
|---|---|---|---|
Support chatbot 100,000 replies a month, ~1,500 input tokens (system prompt + history) and ~400 output tokens each. | $780.00 | $540.00 | Grok 4.7 31% cheaper |
Document Q&A (RAG) 50,000 questions a month with ~8,000 tokens of retrieved context and ~600 output tokens each. | $1,160 | $980.00 | Grok 4.7 16% cheaper |
Coding agent 10,000 agent steps a month, ~40,000 input tokens each (70% read from the prompt cache) and ~2,000 output tokens. | $536.00 | $500.00 | Grok 4.7 7% cheaper |
Cached chatbot The same 100,000-reply support chatbot, but 60% of each prompt (system prompt + conversation history) is served from the prompt cache. | $618.00 | $405.00 | Grok 4.7 34% cheaper |
Meeting notes 10,000 meetings a month summarized from ~12,000-token transcripts, ~1,000 output tokens each. | $360.00 | $300.00 | Grok 4.7 17% cheaper |
Bulk translation 200,000 short translations a month, ~800 input and ~800 output tokens each. | $2,240 | $1,280 | Grok 4.7 43% cheaper |
Content moderation 1,000,000 classifications a month, ~400 input tokens and ~80 output tokens each. | $1,760 | $1,280 | Grok 4.7 27% cheaper |
Article drafting 300 long-form articles a month written from a ~4,000-token brief and outline, ~5,000 output tokens each. | $20.40 | $11.40 | Grok 4.7 44% cheaper |
Code review bot 30,000 pull-request reviews a month, ~5,000 input tokens each (30% cached repository context) and ~700 output tokens. | $471.00 | $358.50 | Grok 4.7 24% cheaper |
Invoice extraction 100,000 documents a month parsed into structured JSON, ~1,200 input and ~250 output tokens each. | $540.00 | $390.00 | Grok 4.7 28% cheaper |
Estimates use standard list prices and ignore cache-write surcharges. Different tokenizers can count the same text differently, so test with your own prompts.
GPT-5.6 Terra vs Grok 4.7 cost calculator
- $980.00/mo$0.02 / req
- GPT-5.6 TerraOpenAI$1,160/mo$0.02 / req
Standard-tier list prices. Long-context rates apply automatically where the provider publishes a threshold. Excludes cache-write surcharges, taxes, batch and volume discounts.
GPT-5.6 Terra pricing notes
The GPT-5.6 model that balances intelligence and cost.
- Cache writes are billed at $2.50 per 1M tokens.
- Fast mode costs 2x the standard rate; Flex costs half.
Grok 4.7 pricing notes
xAI’s newest flagship for coding and general use, with agentic tool calling and configurable reasoning.
- Requests with 200K or more prompt tokens are billed at $4 input / $1 cached / $12 output for all tokens.
- Web Search costs $5 per 1,000 calls; X Search is billed per item fetched, at $5 per 1,000 posts and $10 per 1,000 user profiles.
Frequently asked questions
- Is GPT-5.6 Terra cheaper than Grok 4.7?
- Both charge $2.00 per 1M input tokens. Grok 4.7 is 50% cheaper on output tokens ($6.00 vs $12.00 per 1M). On our document Q&A workload (50,000 questions a month), Grok 4.7 costs $980.00 a month versus $1,160 for GPT-5.6 Terra, 16% less.
- Which is more capable, GPT-5.6 Terra or Grok 4.7?
- GPT-5.6 Terra scores 159.4 on the Epoch Capabilities Index vs 154.4 for Grok 4.7.
- How much does GPT-5.6 Terra cost per 1M tokens?
- GPT-5.6 Terra costs $2.00 per 1M input tokens and $12.00 per 1M output tokens, and $0.20 per 1M cached input tokens on OpenAI’s standard tier.
- How much does Grok 4.7 cost per 1M tokens?
- Grok 4.7 costs $2.00 per 1M input tokens and $6.00 per 1M output tokens, and $0.50 per 1M cached input tokens on xAI’s standard tier.
- Which has the larger context window, GPT-5.6 Terra or Grok 4.7?
- GPT-5.6 Terra has the larger context window: 1.05M tokens versus 500K for Grok 4.7.