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  3. GPT-5.6 Terra vs OpenAI: GPT-5 Image Mini

Pairwise benchmark snapshot · Aug 17, 2026noindex (thin pair)

GPT-5.6 Terra vs OpenAI: GPT-5 Image Mini benchmark

In this head-to-head showdown, OpenAI: GPT-5 Image Mini is more budget-friendly at $2/1M per 1M output tokens. Review the complete breakdown below to determine which model best fits your performance and budget requirements.

Executive Comparison Verdict

Bottom Line: Choose GPT-5.6 Terra if your priority is peak reasoning, complex code generation, and top preference Elo. Choose OpenAI: GPT-5 Image Mini if you are optimizing for low latency, high throughput, and cost-efficient API deployment.
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Executive Verdict Summary

GPT-5.6 Terra holds empirical advantage (2 of 3 metrics)

Coding / SWESWE-bench
GPT-5.6 TerraTop code solve rate
ReasoningGPQA / Live
GPT-5.6 TerraTop logical accuracy
Best Value$/1M Tok
OpenAI: GPT-5 Image MiniLowest API billing cost
Speed / TokTok/Sec
GPT-5.6 TerraFastest stream rate

Verified Advantage Breakdown

3 benchmarks evaluated across capability, speed, and cost

GPT-5.6 Terra (2)OpenAI: GPT-5 Image Mini (1)
GPT-5.6 Terra
2 of 3 Wins
✓Input price✓Context window
OpenAI: GPT-5 Image Mini
1 of 3 Wins
✓Output price
OpenAI
Leads 2 of 3
GPT-5.6 Terra

OpenAI 5.6 mid tier. Official API $2/$12 per 1M after the Jul 30 2026 price cut.

Terra Mid-TierElo 1,548In: $1 · Out: $6/1M
OpenAI
Leads 1 of 3
OpenAI: GPT-5 Image Mini

Auto-discovered from OpenRouter (openai/gpt-5-image-mini). Preview until a second source matches.

In: $2.5 · Out: $2/1M

GPT-5.6 Series Lineage & Sibling Variants

3 models

Currently comparing GPT-5.6 Terra vs OpenAI: GPT-5 Image Mini. Alternative family tiers available.

Active: GPT-5.6 Terra
GPT-5.6 Sol$30GPT-5.6 Luna$0.6
Top Rival Showdowns for GPT-5.6 Terra
All Matchups
Compare vs:vs Claude Opus 4.5vs Gemini 3 Provs Grok 4.6vs DeepSeek V4 Provs Qwen 3 Max
Preference Leader

No shared data

Single model data

Throughput Leader

No shared data

No latency data

Value per Dollar LeaderOpenAI: GPT-5 Image Mini Wins

OpenAI: GPT-5 Image Mini

$2 / 1M output

Capability Percentiles

Relative percentile scores computed across all active models in the benchmark catalog.

Multi-Dimensional Capability Radar

Leaders Matchup Capability Radar

Comparing top standard models across 6 key capability dimensions. Tap any spoke or dot to inspect.

Tap any node to inspect
0–100 %ile

Overall Matchup Breakdown

Category wins across reasoning intelligence, generation speed, and token cost.

GPT-5.6 Terra (9)vsOpenAI: GPT-5 Image Mini (1)
GPT-5.6 Terra: 9W (90%)Overall: GPT-5.6 TerraOpenAI: GPT-5 Image Mini: 1W (10%)
← GPT-5.6 TerraOpenAI: GPT-5 Image Mini →
🏆GPT-5.6 Terra Leads(5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Benchmark
GPT-5.6 TerravsOpenAI: GPT-5 Image Mini
Preference Elo
1,548vs—
Coding Elo
1,542vs—
SWE-bench
70.4%vs—
LiveBench
69.1%vs—
GPQA Diamond
82%vs—
GPT-5.6 Terra: 5WOpenAI: GPT-5 Image Mini: 0W
🏆GPT-5.6 Terra Leads(2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Benchmark
GPT-5.6 TerravsOpenAI: GPT-5 Image Mini
Output speed
128 tok/svs—
Time to first token
160 msvs—
GPT-5.6 Terra: 2WOpenAI: GPT-5 Image Mini: 0W
🏆GPT-5.6 Terra Leads(2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Benchmark
GPT-5.6 TerravsOpenAI: GPT-5 Image Mini
Output price
$6/1Mvs$2/1M+$4/1M
Input price
$1/1Mvs$2.5/1M+$1.5/1M
Context window
1.1Mvs400k+650k
GPT-5.6 Terra: 2WOpenAI: GPT-5 Image Mini: 1W

Side-by-Side Benchmark Matrix

GPT-5.6 TerraOpenAI: GPT-5 Image Mini
Preference Elo
GPT-5.6 Terra1,548
OpenAI: GPT-5 Image Mini—
Coding Elo
GPT-5.6 Terra1,542
OpenAI: GPT-5 Image Mini—
LiveBench
GPT-5.6 Terra69.1%
OpenAI: GPT-5 Image Mini—
SWE-bench
GPT-5.6 Terra70.4%
OpenAI: GPT-5 Image Mini—
GPQA Diamond
GPT-5.6 Terra82%
OpenAI: GPT-5 Image Mini—
Time to first token
GPT-5.6 Terra160 ms
OpenAI: GPT-5 Image Mini—
Output speed
GPT-5.6 Terra128 tok/s
OpenAI: GPT-5 Image Mini—
Input priceGPT-5.6 Terra +$1.5/1M
GPT-5.6 Terra$1/1M
OpenAI: GPT-5 Image Mini$2.5/1M
Output priceOpenAI: GPT-5 Image Mini +$4/1M
GPT-5.6 Terra$6/1M
OpenAI: GPT-5 Image Mini$2/1M
Context windowGPT-5.6 Terra +650k
GPT-5.6 Terra1.1M
OpenAI: GPT-5 Image Mini400k
BenchmarkGPT-5.6 TerraOpenAI: GPT-5 Image MiniAdvantage Delta
Preference Elo
1,548
lmarena · Aug 16, 2026
——
Coding Elo
1,542
lmarena · Aug 16, 2026
——
LiveBench
69.1%
livebench · Aug 16, 2026
——
SWE-bench
70.4%
swebench · Aug 16, 2026
——
GPQA Diamond
82%
seed-bootstrap · Aug 16, 2026
——
Time to first token
160 ms
seed-bootstrap · Aug 16, 2026
——
Output speed
128 tok/s
seed-bootstrap · Aug 16, 2026
——
Input price
$1/1M
openrouter · Aug 17, 2026
$2.5/1M
openrouter · Aug 17, 2026
+$1.5/1M
Output price
$6/1M
openrouter · Aug 17, 2026
$2/1M
openrouter · Aug 17, 2026
+$4/1M
Context window
1.1M
openrouter · Aug 17, 2026
400k
openrouter · Aug 17, 2026
+650k

Workload Cost & Savings Calculator

Simulate monthly production API costs in USD (US Dollar).

Save 6% with OpenAI: GPT-5 Image Mini
Monthly Volume50M tokens/mo
Quick Presets:
Token Ratio (In vs Out)70% In / 30% Out
RAG / Search (10% out)Coding / Chat (50% out)
GPT-5.6 Terra$125.00 / mo
In: $35Out: $90
OpenAI: GPT-5 Image Mini$117.50 / mo
In: $87.5Out: $30
Estimated Cost Delta

OpenAI: GPT-5 Image Mini is estimated to save $7.50/month ($90/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

  • 1
    OpenAI: GPT-5 Image Mini:Pick OpenAI: GPT-5 Image Mini when you are optimizing output cost.
  • 2
    GPT-5.6 Terra:Pick GPT-5.6 Terra for million-token RAG or long-document jobs.

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatOpenAI: GPT-5 Image Mini

Lower output list price ($2/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGGPT-5.6 Terra

Larger window (1.1M).

Screenshots / visionGPT-5.6 Terra

GPT-5.6 Terra is the side marked multimodal in the catalog.

Target WorkloadRecommended PickEvaluation Rationale
Repo / coding agentsinsufficient dataNeed SWE-bench on both sides.
High-volume chatOpenAI: GPT-5 Image MiniLower output list price ($2/1M).
Voice / low-latency UIinsufficient dataNeed TTFT on both sides.
Long-document RAGGPT-5.6 TerraLarger window (1.1M).
Screenshots / visionGPT-5.6 TerraGPT-5.6 Terra is the side marked multimodal in the catalog.

Related Editorial Dispatches & Benchmark Notes

View all news
priceJul 30, 2026

GPT-5.6 Terra after the Jul 30 cut: $2/$12 mid-tier

Terra is OpenAI’s Sonnet-class invoice. Use it when Sol is too expensive and Luna is too small.

Cast Your Matchup Vote

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CompareLLM AI Matrix

Verified Head-to-Head Telemetry

LIVE BENCHMARK
VS
OpenAI

GPT-5.6 Terra

Elo 1,548
SWE-bench70.4%
Speed (tok/s)128 tok/s
Input / 1M Tokens$1/1M
Output / 1M Tokens$6/1M
OpenAI

OpenAI: GPT-5 Image Mini

Elo n/a
SWE-bench—
Speed (tok/s)400k
Input / 1M Tokens$2.5/1M
Output / 1M Tokens$2/1M

Frequently Asked Questions

Which is better overall, GPT-5.6 Terra or OpenAI: GPT-5 Image Mini?
We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.
Which is better at coding, GPT-5.6 Terra or OpenAI: GPT-5 Image Mini?
SWE-bench is missing for at least one model, so we do not rank coding from a single number.
Which is cheaper to run in production?
OpenAI: GPT-5 Image Mini output tokens are $2/1M versus $6/1M. Input prices and retry rates still move the real bill.
Which is faster, GPT-5.6 Terra or OpenAI: GPT-5 Image Mini?
We do not have TTFT for both models.
Which has the larger context window?
GPT-5.6 Terra accepts 1.1M tokens versus 400k.
Can I self-host either model?
Neither model is marked open-weights here. You are comparing hosted APIs.
Are these scores from CompareLLM’s own evals?
No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?
Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. GPT-5.6 Terra and OpenAI: GPT-5 Image Mini Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Related news

  • price · Jul 30, 2026

    GPT-5.6 Terra after the Jul 30 cut: $2/$12 mid-tier

Similar Head-to-Head Comparisons

All GPT-5.6 Terra matchups →|All OpenAI: GPT-5 Image Mini matchups →
GPT-4.5 Orion vs GPT-5.6 TerraGPT-5 vs GPT-5.6 TerraGPT-5.6 Sol vs GPT-5.6 TerraOpenAI: o3 Mini vs GPT-5.6 TerraOpenAI: o1 vs GPT-5.6 TerraGPT-5.6 Luna vs GPT-5.6 Terra