Models/OpenAI/GPT-5.6 Terra

GPT-5.6 Terra

Mid-stack GPT-5.6. 943B this week (+12% WoW, not share). Continuum hosts gpt-5.6-terra. Official list is $2 / $12. AA 57; vals hero 56.53% ±1.24. No official DeepSWE row.

01

Identity

1,047,576Context in
128,000Context out
2026-07-09 (OpenRouter created 1783590857)Released
ProprietaryWeights
Canonical name
GPT-5.6 Terra
Aliases
gpt-5.6-terra, terra, continuum/gpt-5.6-terra
Continuum hosted id
gpt-5.6-terra
OpenRouter slug
openai/gpt-5.6-terra
Hugging Face
None (closed or unpublished)
Modalities
text, image, file
Plan mapping
Codex / ChatGPT plans serve the GPT-5.6 family. Pin with codex -m gpt-5.6-terra. See Codex models.
Closed weights Hosted on Continuum Vendor lab

Closed. Same family as Luna and Sol. OpenRouter catalog 19 Aug 2026: 1,047,576 in / 128,000 out; created unix 1783590857 (9 Jul 2026).

Official OpenAI pricing.md Standard ≤272k is the $2 / $12 pair. Long-context >272k is $4 / $18. Do not invoice the long-context pair as the everyday list.

02

Should I use this for coding agents

Use Terra when Luna is too small and Sol is more than you need. AA Intelligence Index 57; vals hero 56.53% ±1.24. We do not invent a DeepSWE percent: that board has no Terra row in the 13 Aug family notes this cluster already cites.

DeepSWE

No official DeepSWE mini-swe-agent row for this identity on the public board we fetched.

omitted, not invented as of 2026-08-13 source
Artificial Analysispublished integer
57
bench
Artificial Analysis
version
Intelligence Index
harness
published integer
metric
Intelligence Index
value
57
independent as of 2026-08-19 source
Vals Indexvals.ai card
56.53%
bench
Vals Index
version
hero index
harness
vals.ai card
metric
Vals Index
value
56.53%
independent as of 2026-08-19 source

vals.ai Accuracy Rankings hero for Terra, fetched 19 Aug 2026: 56.53% ±1.24, latency 11 min 40 s. That is the vals hero, not DeepSWE, and not SWE-bench Verified as a Continuum chip.

Ranked view: Best coding models: the independent leaderboard puts this row and every other card that carries an independent coding score on one board, with the confidence intervals left visible.

Named benches, printed only

Copied from AA or vals HTML we opened. 0.0% placeholder bars are omitted. Do not average these into the hero tiles, and do not invent CI, $/task, or steps for Artificial Analysis.

BenchPrintedNoteSourceURLAs of
AA throughput 119 tok/s Printed Speed row. Not a coding score. Artificial Analysis GPT-5.6 Terra source 2026-08-19
AA Index eval cost $1,389.66 Printed Index-eval total. Not DeepSWE $/task. Artificial Analysis GPT-5.6 Terra source 2026-08-19
vals hero extras 11 min 40 s latency Printed latency next to Accuracy 56.53% ±1.24. vals.ai Accuracy Rankings 2026-08-19 source 2026-08-19
03

When not to use it

Trust this before you buy

  • No official DeepSWE mini-swe-agent row. vals 56.53% ±1.24 is a different harness. Do not write it as DeepSWE.
  • Need the cheapest GPT-5.6. Luna is $0.20 / $1.20 on the same OpenAI pricing.md table. Need the coding sibling. Sol is $5 / $30 official, DeepSWE 73% ±3, $8.39/task.
  • Closed weights. No official HF repo. Requests over 272k prompt tokens bill the whole request at the long-context pair ($4 / $18 official).

Plus is $25/mo with $25 weekly hosted usage. The Mac app stays free with your own keys. Get Plus is not Download for Mac.

04

Artifact

Weights

OpenAI does not publish Terra weights. No HF Files button. Get Plus is hosted inference.

  • Official OpenAI pricing.md, fetched 19 Aug 2026: Terra Standard $2 input / $0.20 cached / $2.50 cache write / $12 output per million. Long-context >272k $4 / $0.40 / $5 / $18.
  • OpenRouter catalog 19 Aug 2026: $2 / $12, cache read $0.20 /M, cache write $2.50 /M, web search $0.01 per call. That is the standard pair, not the long-context pair.

What you can open

Lab card and OpenRouter listing only. No Hugging Face Files button, because there is no official repo to point at.

Fetched OpenRouter catalog on 2026-08-19. hugging_face_id was empty.

05

Continuum serving

Continuum hosts gpt-5.6-terra on the 19 Aug 2026 bundled allowlist, with Luna and Sol.

Continuum hosted id gpt-5.6-terra

click to select

We list first-party and OpenRouter, plus Continuum only when the live public allowlist named the id. This is not a 15-host routing table.

06

Economics

No DeepSWE $/task: that board has no Terra row.

Official OpenAI pricing.md, 19 Aug 2026: Standard $2 / $12; cache $0.20 / $2.50 write; >272k $4 / $18. OpenRouter reprints the standard pair plus $0.01/request search.

Price this model Opens the pricing calculator preloaded with GPT-5.6 Terra.

Artificial Analysis Intelligence Index 57 at max, fetched 19 Aug 2026. Same page: 119 output tokens/s; $1,389.66 to run the Index. The tile is the published integer 57. Do not invoice at the Index-eval total.

07

Provenance

ClaimSourceAs of
Official Terra Standard $2 / $0.20 cached / $2.50 write / $12; >272k $4 / $0.40 / $5 / $18OpenAI pricing.md2026-08-19
OR catalog $2 / $12, cache r/w $0.20 / $2.50, search $0.01, 1,047,576 / 128,000, created 1783590857OpenRouter catalog2026-08-19
AA Index 57 (max); 119 tok/s; $1,389.66 Index evalArtificial Analysis GPT-5.6 Terra2026-08-19
vals Accuracy 56.53% ±1.24; 11 min 40 svals.ai Accuracy Rankings 2026-08-192026-08-19
Hosted id gpt-5.6-terraContinuum HostedKeyProvider bundled catalog2026-08-19
943B week tokens (+12% WoW)OpenRouter rankings This Week2026-08-19
OpenRouter id openai/gpt-5.6-terra, context 1,047,576OpenRouter /api/v1/models2026-08-19
08

Compare, FAQ, and Get Plus

No other card in this cluster shares a published DeepSWE official row we can put next to this one. We will not compare on vendor-blog numbers.

Continue through OpenAI's model family with gpt-oss-120b.

FAQ

Why no DeepSWE chip?

The official mini-swe-agent board notes this cluster already cites name Fable, Opus, V4 Pro, and Gemini 3.6 Flash, not Terra. vals 56.53% is a different harness.

Is Terra hosted?

Yes. The bundled HostedKeyProvider allowlist names gpt-5.6-terra with Luna and Sol.

Why does the lab blog disagree with DeepSWE or Scale?

Lab posts pick a harness, an effort, a split, and sometimes a private eval set. DeepSWE publishes the official mini-swe-agent row with cost, tokens, and steps. Scale SWE-bench Pro only counts when the public shared-harness board has a row we can fetch. A higher lab number is usually a different test, not a better one.

OpenAI-compatible call

Verified against the live public allowlist on 2026-08-19. Base URL is https://continuumcode.ai/v1. Keys are cont_sk_ from Settings, Account, Inference API. Personal keys need Plus or above.

curl https://continuumcode.ai/v1/chat/completions \
  -H "Authorization: Bearer $CONTINUUM_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"gpt-5.6-terra","messages":[{"role":"user","content":"Review this diff."}]}'

Plus is $25/mo with $25 weekly hosted usage. The Mac app stays free with your own keys. Get Plus is not Download for Mac.