Pairwise benchmark snapshot · Aug 16, 2026

GPT-4 Turbo vs GPT-5.6 Terra benchmark

Name: GPT-4 Turbo vs GPT-5.6 Terra AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares GPT-4 Turbo (OpenAI) and GPT-5.6 Terra (OpenAI) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, GPT-5.6 Terra is ahead by 293 points (1,548 vs 1,255; seed-bootstrap (Aug 16, 2026)). On SWE-bench coding, GPT-5.6 Terra resolves 70.4% versus 33.2% (seed-bootstrap (Aug 16, 2026)). GPT-5.6 Terra streams faster (128 tok/s) while GPT-5.6 Terra is the cheaper output token ($6/1M). GPT-5.6 Terra has the larger context window (1.1M tokens). Every cell below is a dated snapshot from a named public source — we do not invent missing scores, and we do not run SWE-bench ourselves.

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OpenAI

GPT-4 Turbo

GPT-4 Turbo 128k. Historical flagship for gpt-4 turbo vs gpt-4o / gpt-5.

Elo 1,255$30/1M out

OpenAI

GPT-5.6 Terra

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

Elo 1,548$6/1M out

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Quick vs:vs Claude Opus 4.5 vs Claude Opus 4.6 vs Claude Sonnet 4.5 vs Claude 3.7 Sonnet

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

GPT-4 Turbo (0)vsGPT-5.6 Terra (10)

GPT-4 Turbo: 0W (0%)Overall: GPT-5.6 TerraGPT-5.6 Terra: 10W (100%)

← GPT-4 TurboGPT-5.6 Terra →

GPT-5.6 Terra (5/5)

Intelligence & Reasoning

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

Preference Elo

1,255vs1,548

Coding Elo

—vs1,542

SWE-bench

33.2%vs70.4%

LiveBench

47%vs69.1%

GPQA Diamond

48%vs82%

GPT-4 Turbo: 0WGPT-5.6 Terra: 5W

GPT-5.6 Terra (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

55 tok/svs128 tok/s

Time to first token

350 msvs160 ms

GPT-4 Turbo: 0WGPT-5.6 Terra: 2W

GPT-5.6 Terra (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$30/1Mvs$6/1M

Input price

$10/1Mvs$1/1M

Context window

128kvs1.1M

GPT-4 Turbo: 0WGPT-5.6 Terra: 3W

Capability Matchup Radar

Multi-Dimensional Capability Radar

Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.

Tap any node to inspect

Percentile 0–100

Dimensional AdvantageGPT-5.6 Terra 6/6

Preference Elo

GPT-5.6 Terra

293 pts advantage

Throughput Speed

GPT-5.6 Terra

73 tok/s faster

Price Efficiency

GPT-5.6 Terra

$24.00/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

1,255

EloHigh is better

1,548+23%

Code Elo

High is better

—

Code EloHigh is better

1,542

LiveBench

High is better

47%

LiveBenchHigh is better

69.1%+47%

SWE-bench

High is better

33.2%

SWE-benchHigh is better

70.4%+112%

GPQA

High is better

48%

GPQAHigh is better

82%+71%

TTFT

Low is better

350 ms

TTFTLow is better

160 ms+119%

Speed

High is better

55 tok/s

SpeedHigh is better

128 tok/s+133%

In $

Low is better

$10/1M

In $Low is better

$1/1M+900%

Out $

Low is better

$30/1M

Out $Low is better

$6/1M+400%

Context

High is better

128k

ContextHigh is better

1.1M+720%

Interactive Simulator

Workload Cost & Savings Calculator

Simulate monthly production API costs based on published $/1M tokens.

Save up to 84% with GPT-5.6 Terra

Monthly Volume50M tokens/mo

Quick Presets:

Token Ratio (In vs Out)70% In / 30% Out

RAG / Search (10% out)Coding / Chat (50% out)

GPT-4 Turbo$800.00 / mo

In: $350.00Out: $450.00

GPT-5.6 Terra$125.00 / mo

In: $35.00Out: $90.00

Estimated Cost Delta

GPT-5.6 Terra is estimated to save $675.00/month ($8,100/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
GPT-5.6 Terra:Pick GPT-5.6 Terra when repo-level coding accuracy is the constraint.
2
GPT-5.6 Terra:Pick GPT-5.6 Terra when time-to-first-token matters more than peak Elo.
3
GPT-5.6 Terra:Pick GPT-5.6 Terra for million-token RAG or long-document jobs.

Recommended Workload Routing

Repo / coding agentsGPT-5.6 Terra

Higher SWE-bench (70.4%).

High-volume chatGPT-5.6 Terra

Lower output list price ($6/1M).

Voice / low-latency UIGPT-5.6 Terra

Lower TTFT (160 ms).

Long-document RAGGPT-5.6 Terra

Larger window (1.1M).

Screenshots / visionGPT-5.6 Terra

Both accept images. Defaulting to the higher-Elo side (GPT-5.6 Terra).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	GPT-5.6 Terra	Higher SWE-bench (70.4%).
High-volume chat	GPT-5.6 Terra	Lower output list price ($6/1M).
Voice / low-latency UI	GPT-5.6 Terra	Lower TTFT (160 ms).
Long-document RAG	GPT-5.6 Terra	Larger window (1.1M).
Screenshots / vision	GPT-5.6 Terra	Both accept images. Defaulting to the higher-Elo side (GPT-5.6 Terra).

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.

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LIVE

OpenAI

GPT-4 Turbo

Elo 1,255

LiveBench47%

SWE-bench33.2%

Speed55 tok/s

Output cost$30/1M

OpenAI

GPT-5.6 Terra

Elo 1,548

LiveBench69.1%

SWE-bench70.4%

Speed128 tok/s

Output cost$6/1M

Frequently Asked Questions

Which is better overall, GPT-4 Turbo or GPT-5.6 Terra?: GPT-5.6 Terra has the higher preference Elo in our latest snapshot (1,548). “Better” still depends on coding, price, and latency — see the table.
Which is better at coding, GPT-4 Turbo or GPT-5.6 Terra?: GPT-5.6 Terra leads SWE-bench at 70.4% vs 33.2%. SWE-bench is one harness, not your repo.
Which is cheaper to run in production?: GPT-5.6 Terra output tokens are $6/1M versus $30/1M. Input prices and retry rates still move the real bill.
Which is faster, GPT-4 Turbo or GPT-5.6 Terra?: GPT-5.6 Terra has the lower time-to-first-token (160 ms vs 350 ms). Tokens/sec is a separate column if you care about long completions.
Which has the larger context window?: GPT-5.6 Terra accepts 1.1M tokens versus 128k.
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-4 Turbo and GPT-5.6 Terra Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All GPT-4 Turbo matchups →|All GPT-5.6 Terra matchups →

GPT-4 Turbo vs GPT-4o (next gpt-flagship)GPT-5 vs GPT-5.6 Terra GPT-4.5 Orion vs GPT-5.6 Terra GPT-5.6 Sol vs GPT-5.6 Terra GPT-4o mini vs GPT-4 Turbo GPT-5 mini vs GPT-5.6 Terra

GPT-4 Turbo vs GPT-5.6 Terra benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

GPT-4 Turbo (0)vsGPT-5.6 Terra (10)

GPT-4 Turbo: 0W (0%)Overall: GPT-5.6 TerraGPT-5.6 Terra: 10W (100%)

← GPT-4 TurboGPT-5.6 Terra →

GPT-5.6 Terra (5/5)

Intelligence & Reasoning

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

Preference Elo

1,255vs1,548

Coding Elo

—vs1,542

SWE-bench

33.2%vs70.4%

LiveBench

47%vs69.1%

GPQA Diamond

48%vs82%

GPT-4 Turbo: 0WGPT-5.6 Terra: 5W

GPT-5.6 Terra (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

55 tok/svs128 tok/s

Time to first token

350 msvs160 ms

GPT-4 Turbo: 0WGPT-5.6 Terra: 2W

GPT-5.6 Terra (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$30/1Mvs$6/1M

Input price

$10/1Mvs$1/1M

Context window

128kvs1.1M

GPT-4 Turbo: 0WGPT-5.6 Terra: 3W

Recommended Workload Routing

Repo / coding agentsGPT-5.6 Terra

Higher SWE-bench (70.4%).

High-volume chatGPT-5.6 Terra

Lower output list price ($6/1M).

Voice / low-latency UIGPT-5.6 Terra

Lower TTFT (160 ms).

Long-document RAGGPT-5.6 Terra

Larger window (1.1M).

Screenshots / visionGPT-5.6 Terra

Both accept images. Defaulting to the higher-Elo side (GPT-5.6 Terra).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	GPT-5.6 Terra	Higher SWE-bench (70.4%).
High-volume chat	GPT-5.6 Terra	Lower output list price ($6/1M).
Voice / low-latency UI	GPT-5.6 Terra	Lower TTFT (160 ms).
Long-document RAG	GPT-5.6 Terra	Larger window (1.1M).
Screenshots / vision	GPT-5.6 Terra	Both accept images. Defaulting to the higher-Elo side (GPT-5.6 Terra).

Frequently Asked Questions

Which is better overall, GPT-4 Turbo or GPT-5.6 Terra?

GPT-5.6 Terra has the higher preference Elo in our latest snapshot (1,548). “Better” still depends on coding, price, and latency — see the table.

Which is better at coding, GPT-4 Turbo or GPT-5.6 Terra?

GPT-5.6 Terra leads SWE-bench at 70.4% vs 33.2%. SWE-bench is one harness, not your repo.

Which is cheaper to run in production?

GPT-5.6 Terra output tokens are $6/1M versus $30/1M. Input prices and retry rates still move the real bill.

Which is faster, GPT-4 Turbo or GPT-5.6 Terra?

GPT-5.6 Terra has the lower time-to-first-token (160 ms vs 350 ms). Tokens/sec is a separate column if you care about long completions.

Which has the larger context window?

GPT-5.6 Terra accepts 1.1M tokens versus 128k.

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-4 Turbo and GPT-5.6 Terra Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

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Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

GPT-5.6 Terra

GPT-5.6 Terra

GPT-5.6 Terra

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

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

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Community Discussions (0)

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CompareLLM Matrix

GPT-4 Turbo

GPT-5.6 Terra

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

GPT-5.6 Terra

GPT-5.6 Terra

GPT-5.6 Terra

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

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

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

GPT-4 Turbo

GPT-5.6 Terra

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons